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/* This file is part of the program psim. Copyright 1994, 1995, 1996, 1997, 2003 Andrew Cagney This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _EMUL_CHIRP_C_ #define _EMUL_CHIRP_C_ /* Note: this module is called via a table. There is no benefit in making it inline */ #include "emul_generic.h" #include "emul_chirp.h" #ifdef HAVE_STRING_H #include <string.h> #else #ifdef HAVE_STRINGS_H #include <strings.h> #endif #endif #ifdef HAVE_UNISTD_H #include <unistd.h> #endif #ifndef STATIC_INLINE_EMUL_CHIRP #define STATIC_INLINE_EMUL_CHIRP STATIC_INLINE #endif /* EMULATION OpenFirmware - IEEE Standard for Boot (Initialization Configuration) Firmware. DESCRIPTION BUGS This code assumes that the memory node has #address-cells and #size-cells set to one. For future implementations, this may not be the case. */ /* Descriptor of the open boot services being emulated */ typedef int (chirp_handler) (os_emul_data *data, cpu *processor, unsigned_word cia); typedef struct _chirp_services { const char *name; chirp_handler *handler; } chirp_services; /* The OpenBoot emulation is, at any time either waiting for a client request or waiting on a client callback */ typedef enum { serving, emulating, faulting, } chirp_emul_state; struct _os_emul_data { chirp_emul_state state; unsigned_word return_address; unsigned_word arguments; unsigned_word n_args; unsigned_word n_returns; chirp_services *service; device *root; chirp_services *services; /* configuration */ unsigned_word memory_size; unsigned_word real_base; unsigned_word real_size; unsigned_word virt_base; unsigned_word virt_size; int real_mode; int little_endian; int floating_point_available; int interrupt_prefix; unsigned_word load_base; /* hash table */ unsigned_word nr_page_table_entry_groups; unsigned_word htab_offset; unsigned_word htab_ra; unsigned_word htab_va; unsigned_word sizeof_htab; /* virtual address of htab */ unsigned_word stack_offset; unsigned_word stack_ra; unsigned_word stack_va; unsigned_word sizeof_stack; /* addresses of emulation instructions virtual/real */ unsigned_word code_offset; unsigned_word code_va; unsigned_word code_ra; unsigned_word sizeof_code; unsigned_word code_client_va; unsigned_word code_client_ra; unsigned_word code_callback_va; unsigned_word code_callback_ra; unsigned_word code_loop_va; unsigned_word code_loop_ra; }; /* returns the name of the corresponding Ihandle */ static const char * ihandle_name(device_instance *ihandle) { if (ihandle == NULL) return ""; else return device_name(device_instance_device(ihandle)); } /* Read/write the argument list making certain that all values are converted to/from host byte order. In the below only n_args+n_returns is read/written */ static int chirp_read_t2h_args(void *args, int sizeof_args, int n_args, int n_returns, os_emul_data *data, cpu *processor, unsigned_word cia) { unsigned_cell *words; int i; /* check against the number of arguments specified by the client program */ if ((n_args >= 0 && data->n_args != n_args) || (n_returns >= 0 && data->n_returns != n_returns)) { TRACE(trace_os_emul, ("%s - invalid nr of args - n_args=%ld, n_returns=%ld\n", data->service->name, (long)data->n_args, (long)data->n_returns)); return -1; } /* check that there is enough space */ if (sizeof(unsigned_cell) * (data->n_args + data->n_returns) > sizeof_args) return -1; /* bring in the data */ memset(args, 0, sizeof_args); emul_read_buffer(args, data->arguments + 3 * sizeof(unsigned_cell), sizeof(unsigned_cell) * (data->n_args + data->n_returns), processor, cia); /* convert all words to host format */ words = args; for (i = 0; i < (sizeof_args / sizeof(unsigned_cell)); i++) words[i] = T2H_cell(words[i]); return 0; } static void chirp_write_h2t_args(void *args, int sizeof_args, os_emul_data *data, cpu *processor, unsigned_word cia) { int i; unsigned_cell *words; /* convert to target everything */ words = args; for (i = 0; i < (sizeof_args / sizeof(unsigned_cell)); i++) words[i] = H2T_cell(words[i]); /* bring in the data */ emul_write_buffer(args, data->arguments + 3 * sizeof(unsigned_cell), sizeof(unsigned_cell) * (data->n_args + data->n_returns), processor, cia); } /* OpenBoot emulation functions */ /* client interface */ static int chirp_emul_test(os_emul_data *data, cpu *processor, unsigned_word cia) { struct test_args { /*in*/ unsigned_cell name; /*string*/ /*out*/ unsigned_cell missing; } args; char name[32]; chirp_services *service = NULL; /* read in the arguments */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; emul_read_string(name, args.name, sizeof(name), processor, cia); TRACE(trace_os_emul, ("test - in - name=`%s'\n", name)); /* see if we know about the service */ service = data->services; while (service->name != NULL && strcmp(service->name, name) != 0) { service++; } if (service->name == NULL) args.missing = -1; else args.missing = 0; /* write the arguments back out */ TRACE(trace_os_emul, ("test - out - missing=%ld\n", (long)args.missing)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } /* Device tree */ static int chirp_emul_peer(os_emul_data *data, cpu *processor, unsigned_word cia) { struct peer_args { /*in*/ unsigned_cell phandle; /*out*/ unsigned_cell sibling_phandle; } args; device *phandle; device *sibling_phandle = NULL; /* read in the arguments */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; phandle = external_to_device(data->root, args.phandle); TRACE(trace_os_emul, ("peer - in - phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)))); /* find the peer */ if (args.phandle == 0) { sibling_phandle = data->root; args.sibling_phandle = device_to_external(sibling_phandle); } else if (phandle == NULL) { sibling_phandle = NULL; args.sibling_phandle = -1; } else { sibling_phandle = device_sibling(phandle); if (sibling_phandle == NULL) args.sibling_phandle = 0; else args.sibling_phandle = device_to_external(sibling_phandle); } /* write the arguments back out */ TRACE(trace_os_emul, ("peer - out - sibling_phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.sibling_phandle, (unsigned long)sibling_phandle, (sibling_phandle == NULL ? "" : device_name(sibling_phandle)))); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_child(os_emul_data *data, cpu *processor, unsigned_word cia) { struct child_args { /*in*/ unsigned_cell phandle; /*out*/ unsigned_cell child_phandle; } args; device *phandle; device *child_phandle; /* read the arguments in */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; phandle = external_to_device(data->root, args.phandle); TRACE(trace_os_emul, ("child - in - phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)))); /* find a child */ if (args.phandle == 0 || phandle == NULL) { child_phandle = NULL; args.child_phandle = -1; } else { child_phandle = device_child(phandle); if (child_phandle == NULL) args.child_phandle = 0; else args.child_phandle = device_to_external(child_phandle); } /* write the result out */ TRACE(trace_os_emul, ("child - out - child_phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.child_phandle, (unsigned long)child_phandle, (child_phandle == NULL ? "" : device_name(child_phandle)))); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_parent(os_emul_data *data, cpu *processor, unsigned_word cia) { struct parent_args { /*in*/ unsigned_cell phandle; /*out*/ unsigned_cell parent_phandle; } args; device *phandle; device *parent_phandle; /* read the args in */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; phandle = external_to_device(data->root, args.phandle); TRACE(trace_os_emul, ("parent - in - phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)))); /* find a parent */ if (args.phandle == 0 || phandle == NULL) { parent_phandle = NULL; args.parent_phandle = -1; } else { parent_phandle = device_parent(phandle); if (parent_phandle == NULL) args.parent_phandle = 0; else args.parent_phandle = device_to_external(parent_phandle); } /* return the result */ TRACE(trace_os_emul, ("parent - out - parent_phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.parent_phandle, (unsigned long)parent_phandle, (parent_phandle == NULL ? "" : device_name(parent_phandle)))); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_instance_to_package(os_emul_data *data, cpu *processor, unsigned_word cia) { struct instance_to_package_args { /*in*/ unsigned_cell ihandle; /*out*/ unsigned_cell phandle; } args; device_instance *ihandle; device *phandle = NULL; /* read the args in */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; ihandle = external_to_device_instance(data->root, args.ihandle); TRACE(trace_os_emul, ("instance-to-package - in - ihandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle))); /* find the corresponding phandle */ if (ihandle == NULL) { phandle = NULL; args.phandle = -1; } else { phandle = device_instance_device(ihandle); args.phandle = device_to_external(phandle); } /* return the result */ TRACE(trace_os_emul, ("instance-to-package - out - phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)))); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_getproplen(os_emul_data *data, cpu *processor, unsigned_word cia) { struct getproplen_args { /*in*/ unsigned_cell phandle; unsigned_cell name; /*out*/ unsigned_cell proplen; } args; char name[32]; device *phandle; /* read the args in */ if (chirp_read_t2h_args(&args, sizeof(args), 2, 1, data, processor, cia)) return -1; phandle = external_to_device(data->root, args.phandle); emul_read_string(name, args.name, sizeof(name), processor, cia); TRACE(trace_os_emul, ("getproplen - in - phandle=0x%lx(0x%lx`%s') name=`%s'\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)), name)); /* find our prop and get its length */ if (args.phandle == 0 || phandle == NULL) { args.proplen = -1; } else { const device_property *prop = device_find_property(phandle, name); if (prop == (device_property*)0) { args.proplen = -1; } else { args.proplen = prop->sizeof_array; } } /* return the result */ TRACE(trace_os_emul, ("getproplen - out - proplen=%ld\n", (unsigned long)args.proplen)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_getprop(os_emul_data *data, cpu *processor, unsigned_word cia) { struct getprop_args { /*in*/ unsigned_cell phandle; unsigned_cell name; unsigned_cell buf; unsigned_cell buflen; /*out*/ unsigned_cell size; } args; char name[32]; device *phandle; /* read in the args, the return is optional */ if (chirp_read_t2h_args(&args, sizeof(args), 4, -1, data, processor, cia)) return -1; phandle = external_to_device(data->root, args.phandle); emul_read_string(name, args.name, sizeof(name), processor, cia); TRACE(trace_os_emul, ("getprop - in - phandle=0x%lx(0x%lx`%s') name=`%s' buf=0x%lx buflen=%ld\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)), name, (unsigned long)args.buf, (unsigned long)args.buflen)); /* get the property */ if (args.phandle == 0 || phandle == NULL) { args.size = -1; } else { const device_property *prop = device_find_property(phandle, name); if (prop == NULL) { args.size = -1; } else { int size = args.buflen; if (size > prop->sizeof_array) size = prop->sizeof_array; emul_write_buffer(prop->array, args.buf, size, processor, cia); args.size = size; switch (prop->type) { case string_property: TRACE(trace_os_emul, ("getprop - string `%s'\n", device_find_string_property(phandle, name))); break; case ihandle_property: TRACE(trace_os_emul, ("getprop - ihandle=0x%lx(0x%lx`%s')\n", BE2H_cell(*(unsigned_cell*)prop->array), (unsigned long)device_find_ihandle_property(phandle, name), ihandle_name(device_find_ihandle_property(phandle, name)))); break; default: break; } } } /* write back the result */ if (data->n_returns == 0) TRACE(trace_os_emul, ("getprop - out - size=%ld (not returned)\n", (unsigned long)args.size)); else { TRACE(trace_os_emul, ("getprop - out - size=%ld\n", (unsigned long)args.size)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); } return 0; } static int chirp_emul_nextprop(os_emul_data *data, cpu *processor, unsigned_word cia) { struct nextprop_args { /*in*/ unsigned_cell phandle; unsigned_cell previous; unsigned_cell buf; /*out*/ unsigned_cell flag; } args; char previous[32]; device *phandle; /* read in the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia)) return -1; phandle = external_to_device(data->root, args.phandle); if (args.previous != 0) emul_read_string(previous, args.previous, sizeof(previous), processor, cia); else /* If previous is NULL, make it look like the empty string. The next property after the empty string is the first property. */ strcpy (previous, ""); TRACE(trace_os_emul, ("nextprop - in - phandle=0x%lx(0x%lx`%s') previous=`%s' buf=0x%lx\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)), previous, (unsigned long)args.buf)); /* find the next property */ if (args.phandle == 0 || phandle == NULL) { args.flag = -1; } else { const device_property *prev_prop = device_find_property(phandle, previous); if (prev_prop == NULL) { if (strcmp (previous, "") == 0) args.flag = 0; /* No properties */ else args.flag = -1; /* name invalid */ } else { const device_property *next_prop; if (strcmp (previous, "") == 0) { next_prop = prev_prop; /* The first property. */ } else { next_prop = device_next_property(prev_prop); } if (next_prop == NULL) { args.flag = 0; /* last property */ } else { emul_write_buffer(next_prop->name, args.buf, strlen(next_prop->name), processor, cia); TRACE(trace_os_emul, ("nextprop - name=`%s'\n", next_prop->name)); args.flag = 1; /* worked ok */ } } } /* write back the result */ TRACE(trace_os_emul, ("nextprop - out - flag=%ld\n", (unsigned long)args.flag)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } #if 0 static int chirp_emul_setprop(os_emul_data *data, cpu *processor, unsigned_word cia) { error("chirp: setprop method not implemented\n"); return 0; } #endif static int chirp_emul_canon(os_emul_data *data, cpu *processor, unsigned_word cia) { struct canon_args { /*in*/ unsigned_cell device_specifier; unsigned_cell buf; unsigned_cell buflen; /*out*/ unsigned_cell length; } args; char device_specifier[1024]; device *phandle; const char *path; int length; /* read in the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia)) return -1; emul_read_string(device_specifier, args.device_specifier, sizeof(device_specifier), processor, cia); TRACE(trace_os_emul, ("canon - in - device_specifier=`%s' buf=0x%lx buflen=%lx\n", device_specifier, (unsigned long)args.buf, (unsigned long)args.buflen)); /* canon the name */ phandle = tree_find_device(data->root, device_specifier); if (phandle == NULL) { length = -1; path = ""; args.length = -1; } else { path = device_path(phandle); length = strlen(path); if (length >= args.buflen) length = args.buflen - 1; emul_write_buffer(path, args.buf, length, processor, cia); args.length = length; } /* write back the result */ TRACE(trace_os_emul, ("canon - out - length=%ld buf=`%s'\n", (unsigned long)args.length, path)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_finddevice(os_emul_data *data, cpu *processor, unsigned_word cia) { struct finddevice_args { /*in*/ unsigned_cell device_specifier; /*out*/ unsigned_cell phandle; } args; char device_specifier[1024]; device *phandle; /* get the args */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; emul_read_string(device_specifier, args.device_specifier, sizeof(device_specifier), processor, cia); TRACE(trace_os_emul, ("finddevice - in - device_specifier=`%s'\n", device_specifier)); /* find the device */ phandle = tree_find_device(data->root, device_specifier); if (phandle == NULL) args.phandle = -1; else args.phandle = device_to_external(phandle); /* return its phandle */ TRACE(trace_os_emul, ("finddevice - out - phandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)))); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_instance_to_path(os_emul_data *data, cpu *processor, unsigned_word cia) { struct instance_to_path_args { /*in*/ unsigned_cell ihandle; unsigned_cell buf; unsigned_cell buflen; /*out*/ unsigned_cell length; } args; device_instance *ihandle; const char *path; int length; /* get the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia)) return -1; ihandle = external_to_device_instance(data->root, args.ihandle); TRACE(trace_os_emul, ("instance-to-path - in - ihandle=0x%lx(0x%lx`%s') buf=0x%lx buflen=%ld\n", (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle), (unsigned long)args.buf, (unsigned long)args.buflen)); /* get the devices name */ if (ihandle == NULL) { args.length = -1; path = "(null)"; } else { path = device_instance_path(ihandle); length = strlen(path); if (length >= args.buflen) length = args.buflen - 1; emul_write_buffer(path, args.buf, length, processor, cia); args.length = length; } /* return its phandle */ TRACE(trace_os_emul, ("instance-to-path - out - length=%ld buf=`%s')\n", (unsigned long)args.length, path)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_package_to_path(os_emul_data *data, cpu *processor, unsigned_word cia) { struct package_to_path_args { /*in*/ unsigned_cell phandle; unsigned_cell buf; unsigned_cell buflen; /*out*/ unsigned_cell length; } args; device *phandle; const char *path; /* get the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia)) return -1; phandle = external_to_device(data->root, args.phandle); TRACE(trace_os_emul, ("package-to-path - in - phandle=0x%lx(0x%lx`%s') buf=0x%lx buflen=%ld\n", (unsigned long)args.phandle, (unsigned long)phandle, (phandle == NULL ? "" : device_name(phandle)), (unsigned long)args.buf, (unsigned long)args.buflen)); /* get the devices name */ if (phandle == NULL) { args.length = -1; path = "(null)"; } else { int length; path = device_path(phandle); length = strlen(path); if (length >= args.buflen) length = args.buflen - 1; emul_write_buffer(path, args.buf, length, processor, cia); args.length = length; } /* return its phandle */ TRACE(trace_os_emul, ("package-to-path - out - length=%ld buf=`%s')\n", (unsigned long)args.length, path)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_call_method(os_emul_data *data, cpu *processor, unsigned_word cia) { struct call_method_args { /*in*/ unsigned_cell method; unsigned_cell ihandle; /*in/out*/ unsigned_cell stack[13]; /*6in + 6out + catch */ } args; char method[32]; device_instance *ihandle; /* some useful info about our mini stack */ int n_stack_args; int n_stack_returns; int stack_catch_result; int stack_returns; /* read the args */ if (chirp_read_t2h_args(&args, sizeof(args), -1, -1, data, processor, cia)) return -1; emul_read_string(method, args.method, sizeof(method), processor, cia); ihandle = external_to_device_instance(data->root, args.ihandle); n_stack_args = data->n_args - 2; n_stack_returns = data->n_returns - 1; stack_catch_result = n_stack_args; stack_returns = stack_catch_result + 1; TRACE(trace_os_emul, ("call-method - in - n_args=%ld n_returns=%ld method=`%s' ihandle=0x%lx(0x%lx`%s')\n", (unsigned long)data->n_args, (unsigned long)data->n_returns, method, (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle))); /* see if we can emulate this method */ if (ihandle == NULL) { /* OpenFirmware doesn't define this error */ error("chirp: invalid ihandle passed to call-method method"); } else { args.stack[stack_catch_result] = device_instance_call_method(ihandle, method, n_stack_args, &args.stack[0], n_stack_returns, &args.stack[stack_returns]); } /* finished */ TRACE(trace_os_emul, ("call-method - out - catch-result=%ld\n", (unsigned long)args.stack[stack_catch_result])); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } /* Device I/O */ static int chirp_emul_open(os_emul_data *data, cpu *processor, unsigned_word cia) { struct open_args { /*in*/ unsigned_cell device_specifier; /*out*/ unsigned_cell ihandle; } args; char device_specifier[1024]; device_instance *ihandle; /* read the args */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; emul_read_string(device_specifier, args.device_specifier, sizeof(device_specifier), processor, cia); TRACE(trace_os_emul, ("open - in - device_specifier=`%s'\n", device_specifier)); /* open the device */ ihandle = tree_instance(data->root, device_specifier); if (ihandle == NULL) args.ihandle = -1; else args.ihandle = device_instance_to_external(ihandle); /* return the ihandle result */ TRACE(trace_os_emul, ("open - out - ihandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle))); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_close(os_emul_data *data, cpu *processor, unsigned_word cia) { struct close_args { /*in*/ unsigned_cell ihandle; /*out*/ } args; device_instance *ihandle; /* read the args */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 0, data, processor, cia)) return -1; ihandle = external_to_device_instance(data->root, args.ihandle); TRACE(trace_os_emul, ("close - in - ihandle=0x%lx(0x%lx`%s')\n", (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle))); /* close the device */ if (ihandle == NULL) { /* OpenFirmware doesn't define this error */ error("chirp: invalid ihandle passed to close method"); } else { device_instance_delete(ihandle); } /* return the ihandle result */ TRACE(trace_os_emul, ("close - out\n")); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_read(os_emul_data *data, cpu *processor, unsigned_word cia) { struct read_args { /*in*/ unsigned_cell ihandle; unsigned_cell addr; unsigned_cell len; /*out*/ unsigned_cell actual; } args; char buf[1024]; device_instance *ihandle; /* read the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia)) return -1; ihandle = external_to_device_instance(data->root, args.ihandle); TRACE(trace_os_emul, ("read - in - ihandle=0x%lx(0x%lx`%s') addr=0x%lx len=%ld\n", (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle), (unsigned long)args.addr, (unsigned long)args.len)); if (ihandle == NULL) { /* OpenFirmware doesn't define this error */ error("chirp: invalid ihandle passed to read method"); } else { /* do the reads */ int actual = 0; while (actual < args.len) { int remaining = args.len - actual; int to_read = (remaining <= sizeof(buf) ? remaining : sizeof(buf)); int nr_read = device_instance_read(ihandle, buf, to_read); if (nr_read < 0) { actual = nr_read; /* the error */ break; } else if (nr_read == 0) { break; } emul_write_buffer(buf, args.addr + actual, nr_read, processor, cia); actual += nr_read; } if (actual >= 0) { args.actual = actual; if (actual < sizeof(buf)) buf[actual] = '\0'; else buf[sizeof(buf) - 1] = '\0'; } else { switch (actual) { case sim_io_eof: args.actual = 0; break; case sim_io_not_ready: ASSERT(sim_io_not_ready == -2); args.actual = sim_io_not_ready; break; default: error("Bad error value %ld", (long)actual); break; } } } /* return the result */ TRACE(trace_os_emul, ("read - out - actual=%ld `%s'\n", (long)args.actual, ((args.actual > 0 && args.actual < sizeof(buf)) ? buf : "") )); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_write(os_emul_data *data, cpu *processor, unsigned_word cia) { struct write_args { /*in*/ unsigned_cell ihandle; unsigned_cell addr; unsigned_cell len; /*out*/ unsigned_cell actual; } args; char buf[1024]; device_instance *ihandle; int actual; /* get the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia)) return -1; actual = args.len; if (actual >= sizeof(buf)) actual = sizeof(buf) - 1; emul_read_buffer(buf, args.addr, actual, processor, cia); buf[actual] = '\0'; ihandle = external_to_device_instance(data->root, args.ihandle); TRACE(trace_os_emul, ("write - in - ihandle=0x%lx(0x%lx`%s') `%s' (%ld)\n", (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle), buf, (long)actual)); if (ihandle == NULL) { /* OpenFirmware doesn't define this error */ error("chirp: invalid ihandle passed to write method"); } else { /* write it out */ actual = device_instance_write(ihandle, buf, actual); if (actual < 0) args.actual = 0; else args.actual = actual; } /* return the result */ TRACE(trace_os_emul, ("write - out - actual=%ld\n", (long)args.actual)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_seek(os_emul_data *data, cpu *processor, unsigned_word cia) { struct seek_args { /*in*/ unsigned_cell ihandle; unsigned_cell pos_hi; unsigned_cell pos_lo; /*out*/ unsigned_cell status; } args; int status; device_instance *ihandle; /* get the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia)) return -1; ihandle = external_to_device_instance(data->root, args.ihandle); TRACE(trace_os_emul, ("seek - in - ihandle=0x%lx(0x%lx`%s') pos.hi=0x%lx pos.lo=0x%lx\n", (unsigned long)args.ihandle, (unsigned long)ihandle, ihandle_name(ihandle), args.pos_hi, args.pos_lo)); if (ihandle == NULL) { /* OpenFirmware doesn't define this error */ error("chirp: invalid ihandle passed to seek method"); } else { /* seek it out */ status = device_instance_seek(ihandle, args.pos_hi, args.pos_lo); args.status = status; } /* return the result */ TRACE(trace_os_emul, ("seek - out - status=%ld\n", (long)args.status)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } /* memory */ static int chirp_emul_claim(os_emul_data *data, cpu *processor, unsigned_word cia) { /* NOTE: the client interface claim routine is *very* different to the "claim" method described in IEEE-1275 appendix A. The latter uses real addresses while this uses virtual (effective) addresses. */ struct claim_args { /* in */ unsigned_cell virt; unsigned_cell size; unsigned_cell align; /* out */ unsigned_cell baseaddr; } args; /* read the args */ if (chirp_read_t2h_args(&args, sizeof(args), 3 /*n_args*/, 1 /*n_returns*/, data, processor, cia)) return -1; TRACE(trace_os_emul, ("claim - in - virt=0x%lx size=%ld align=%d\n", (unsigned long)args.virt, (long int)args.size, (int)args.align)); /* use the memory device to allocate (real) memory at the requested address */ { device_instance *memory = tree_find_ihandle_property(data->root, "/chosen/memory"); unsigned_cell mem_in[3]; unsigned_cell mem_out[1]; mem_in[0] = args.align; /*top-of-stack*/ mem_in[1] = args.size; mem_in[2] = args.virt; if (device_instance_call_method(memory, "claim", 3, mem_in, 1, mem_out) < 0) error("chirp: claim failed to allocate memory virt=0x%lx size=%ld align=%d", (unsigned long)args.virt, (long int)args.size, (int)args.align); args.baseaddr = mem_out[0]; } /* if using virtual addresses, create a 1-1 map of this address space */ if (!data->real_mode) { error("chirp: claim method does not support virtual mode"); } /* return the base address */ TRACE(trace_os_emul, ("claim - out - baseaddr=0x%lx\n", (unsigned long)args.baseaddr)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static int chirp_emul_release(os_emul_data *data, cpu *processor, unsigned_word cia) { /* NOTE: the client interface release routine is *very* different to the "claim" method described in IEEE-1275 appendix A. The latter uses real addresses while this uses virtual (effective) addresses. */ struct claim_args { /* in */ unsigned_cell virt; unsigned_cell size; /* out */ } args; /* read the args */ if (chirp_read_t2h_args(&args, sizeof(args), 2 /*n_args*/, 0 /*n_returns*/, data, processor, cia)) return -1; TRACE(trace_os_emul, ("release - in - virt=0x%lx size=%ld\n", (unsigned long)args.virt, (long int)args.size)); /* use the memory device to release (real) memory at the requested address */ { device_instance *memory = tree_find_ihandle_property(data->root, "/chosen/memory"); unsigned_cell mem_in[2]; mem_in[0] = args.size; mem_in[1] = args.virt; if (device_instance_call_method(memory, "release", 2, mem_in, 0, NULL) < 0) error("chirp: claim failed to release memory virt=0x%lx size=%ld", (unsigned long)args.virt, (long int)args.size); } /* if using virtual addresses, remove the 1-1 map of this address space */ if (!data->real_mode) { error("chirp: release method does not support virtual mode"); } /* return the base address */ TRACE(trace_os_emul, ("release - out\n")); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } /* Control transfer */ static int chirp_emul_boot(os_emul_data *data, cpu *processor, unsigned_word cia) { /* unlike OpenFirmware this one can take an argument */ struct boot_args { /*in*/ unsigned_cell bootspec; /*out*/ } args; char bootspec[1024]; /* read in the arguments */ if (chirp_read_t2h_args(&args, sizeof(args), -1, 0, data, processor, cia)) cpu_halt(processor, cia, was_exited, -1); if (args.bootspec != 0) emul_read_string(bootspec, args.bootspec, sizeof(bootspec), processor, cia); else strcpy(bootspec, "(null)"); TRACE(trace_os_emul, ("boot - in bootspec=`%s'\n", bootspec)); /* just report this and exit */ printf_filtered("chrp: boot %s called, exiting.\n", bootspec); cpu_halt(processor, cia, was_exited, 0); return 0; } static int chirp_emul_enter(os_emul_data *data, cpu *processor, unsigned_word cia) { error("chirp: enter method not implemented\n"); return 0; } static int chirp_emul_exit(os_emul_data *data, cpu *processor, unsigned_word cia) { /* unlike OpenBoot this one can take an argument */ struct exit_args { /*in*/ signed_cell status; /*out*/ } args; if (chirp_read_t2h_args(&args, sizeof(args), -1, 0, data, processor, cia)) cpu_halt(processor, cia, was_exited, -1); cpu_halt(processor, cia, was_exited, args.status); return 0; } static int chirp_emul_chain(os_emul_data *data, cpu *processor, unsigned_word cia) { error("chirp: chain method not implemented\n"); return 0; } /* user interface */ static int chirp_emul_interpret(os_emul_data *data, cpu *processor, unsigned_word cia) { error("chirp: interpret method not implemented\n"); return 0; } static int chirp_emul_set_callback(os_emul_data *data, cpu *processor, unsigned_word cia) { error("chirp: set_callback method not implemented\n"); return 0; } static int chirp_emul_set_symbol_lookup(os_emul_data *data, cpu *processor, unsigned_word cia) { error("chirp: set_symbol_lookup method not implemented\n"); return 0; } /* Time */ static int chirp_emul_milliseconds(os_emul_data *data, cpu *processor, unsigned_word cia) { struct test_args { /*in*/ /*out*/ unsigned_cell ms; } args; unsigned64 time; /* read in the arguments */ if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia)) return -1; /* make up a number */ time = event_queue_time(psim_event_queue(cpu_system(processor))) / 1000000; args.ms = time; /* write the arguments back out */ TRACE(trace_os_emul, ("milliseconds - out - ms=%ld\n", (unsigned long)args.ms)); chirp_write_h2t_args(&args, sizeof(args), data, processor, cia); return 0; } static chirp_services services[] = { /* client interface */ { "test", chirp_emul_test }, /* device tree */ { "peer", chirp_emul_peer }, { "child", chirp_emul_child }, { "parent", chirp_emul_parent }, { "instance-to-package", chirp_emul_instance_to_package }, { "getproplen", chirp_emul_getproplen }, { "getprop", chirp_emul_getprop }, { "nextprop", chirp_emul_nextprop }, /* { "setprop", chirp_emul_setprop }, */ { "canon", chirp_emul_canon }, { "finddevice", chirp_emul_finddevice }, { "instance-to-path", chirp_emul_instance_to_path }, { "package-to-path", chirp_emul_package_to_path }, { "call-method", chirp_emul_call_method }, /* device I/O */ { "open", chirp_emul_open }, { "close", chirp_emul_close }, { "read", chirp_emul_read }, { "write", chirp_emul_write }, { "seek", chirp_emul_seek }, { "write", chirp_emul_write }, /* memory */ { "claim", chirp_emul_claim }, { "release", chirp_emul_release }, /* control transfer */ { "boot", chirp_emul_boot }, { "enter", chirp_emul_enter }, { "exit", chirp_emul_exit }, { "chain", chirp_emul_chain }, /* user interface */ { "interpret", chirp_emul_interpret }, { "set_callback", chirp_emul_set_callback }, { "set_symbol_lookup", chirp_emul_set_symbol_lookup }, /* time */ { "milliseconds", chirp_emul_milliseconds }, { 0, /* sentinal */ }, }; /* main handlers */ /* Any starting address greater than this is assumed to be an Chirp rather than VEA */ #ifndef CHIRP_START_ADDRESS #define CHIRP_START_ADDRESS 0x80000000 #endif #ifndef CHIRP_LOAD_BASE #define CHIRP_LOAD_BASE -1 #endif typedef struct _chirp_note_desc { signed32 real_mode; signed32 real_base; signed32 real_size; signed32 virt_base; signed32 virt_size; signed32 load_base; } chirp_note_desc; typedef enum { note_missing, note_found, note_correct, } note_found_status; typedef struct _chirp_note { chirp_note_desc desc; note_found_status found; } chirp_note; typedef struct _chirp_note_head { unsigned32 namesz; unsigned32 descsz; unsigned32 type; } chirp_note_head; static void map_over_chirp_note(bfd *image, asection *sect, PTR obj) { chirp_note *note = (chirp_note*)obj; if (strcmp(sect->name, ".note") == 0) { chirp_note_head head; char name[16]; /* check the head */ if (!bfd_get_section_contents(image, sect, &head, 0, sizeof(head))) return; head.namesz = bfd_get_32(image, (void*)&head.namesz); head.descsz = bfd_get_32(image, (void*)&head.descsz); head.type = bfd_get_32(image, (void*)&head.type); if (head.type != 0x1275) return; /* check the name field */ if (head.namesz > sizeof(name)) { error("chirp: note name too long (%d > %d)\n", (int)head.namesz, sizeof(name)); } if (!bfd_get_section_contents(image, sect, name, sizeof(head), head.namesz)) { error("chirp: note name unreadable\n"); } if (strcmp(name, "PowerPC") != 0) { printf_filtered("chirp: note name (%s) not `PowerPC'\n", name); } /* check the size */ if (head.descsz == sizeof(note->desc) - sizeof(signed32)) { sim_io_printf_filtered("chirp: note descriptor missing load-base\n"); } else if (head.descsz != sizeof(note->desc)) { sim_io_printf_filtered("chirp: note descriptor of wrong size\n"); note->found = note_found; return; } note->found = note_correct; /* get the contents */ if (!bfd_get_section_contents(image, sect, ¬e->desc, /* page align start */ ((sizeof(head) + head.namesz) + 3) & ~3, head.descsz)) { error("chirp: note descriptor unreadable\n"); } note->desc.real_mode = bfd_get_32(image, (void*)¬e->desc.real_mode); note->desc.real_base = bfd_get_32(image, (void*)¬e->desc.real_base); note->desc.real_size = bfd_get_32(image, (void*)¬e->desc.real_size); note->desc.virt_base = bfd_get_32(image, (void*)¬e->desc.virt_base); note->desc.virt_size = bfd_get_32(image, (void*)¬e->desc.virt_size); if (head.descsz == sizeof(note->desc)) note->desc.load_base = bfd_get_32(image, (void*)¬e->desc.load_base); else note->desc.load_base = (signed32)-1; } } static os_emul_data * emul_chirp_create(device *root, bfd *image, const char *name) { os_emul_data *chirp; device *node; chirp_note note; int i; /* Sanity check that this really is the chosen emulation */ if (name == NULL && image == NULL) return NULL; if (name != NULL && strcmp(name, "ob") != 0 && strcmp(name, "ieee1274") != 0 && strcmp(name, "chrp") != 0 && strcmp(name, "chirp") != 0 && strcmp(name, "openboot") != 0) return NULL; /* look for an elf note section, enter its values into the device tree */ memset(¬e, 0, sizeof(note)); if (image != NULL) bfd_map_over_sections(image, map_over_chirp_note, ¬e); if (name == NULL && image != NULL && note.found == note_missing) return NULL; /* Assume that it is a chirp emulation */ chirp = ZALLOC(os_emul_data); chirp->root = root; chirp->services = services; /* the root node */ tree_parse(root, "/name \"gpl,clayton"); /* default options */ emul_add_tree_options(root, image, "chirp", "oea", 0 /*oea-interrupt-prefix*/); /* hardware */ emul_add_tree_hardware(root); /* basic information */ chirp->memory_size = tree_find_integer_property(root, "/openprom/options/oea-memory-size"); chirp->little_endian = tree_find_boolean_property(root, "/options/little-endian?"); chirp->floating_point_available = tree_find_boolean_property(root, "/openprom/options/floating-point?"); chirp->interrupt_prefix = tree_find_integer_property(root, "/openprom/options/oea-interrupt-prefix"); /* Perform an interum layout of the openboot firmware in memory */ /* a page for firmware calls */ chirp->sizeof_code = 4096; chirp->code_offset = 0x4000; /* possible space for interrupt table */ /* the stack */ chirp->sizeof_stack = 32 * 1024; chirp->stack_offset = chirp->code_offset + chirp->sizeof_code; /* the hash table */ if (!note.desc.real_mode) { chirp->nr_page_table_entry_groups = (chirp->memory_size < 0x800000 ? 1024 /* min allowed */ : (chirp->memory_size / 4096 / 2)); chirp->sizeof_htab = chirp->nr_page_table_entry_groups * 64; } chirp->htab_offset = chirp->stack_offset + chirp->sizeof_stack; /* the actual amount of space needed */ chirp->real_size = chirp->htab_offset + chirp->sizeof_htab; /* now go through and see if it fits in what is available */ /* resolve real-mode? */ if (note.found == note_correct) chirp->real_mode = note.desc.real_mode; else if (tree_find_property(root, "/options/real-mode?") != NULL) chirp->real_mode = tree_find_boolean_property(root, "/options/real-mode?"); else chirp->real_mode = 0; if (tree_find_property(root, "/options/real-mode?") != NULL) { if (!chirp->real_mode != !tree_find_boolean_property(root, "/options/real-mode?")) error("chirp: /options/real-mode? conflicts with note section\n"); } else tree_parse(root, "/options/real-mode? %s", chirp->real_mode ? "true" : "false"); /* resolve real-base */ if (note.found == note_correct && note.desc.real_base != (signed32)-1) chirp->real_base = note.desc.real_base; else if (tree_find_property(root, "/options/real-base") != NULL) chirp->real_base = tree_find_integer_property(root, "/options/real-base"); else chirp->real_base = chirp->memory_size - chirp->real_size; if (tree_find_property(root, "/options/real-base") != NULL) { if (chirp->real_base != tree_find_integer_property(root, "/options/real-base")) error("chirp: /options/real-base conflicts with note section\n"); } else tree_parse(root, "/options/real-base 0x%lx", (unsigned long)chirp->real_base); /* resolve real-size */ if (note.found == note_correct && note.desc.real_size != (signed32)-1 && note.desc.real_size != 0 && chirp->real_size > note.desc.real_size) error("chirp: insufficient physical memory for firmware\n"); if (tree_find_property(root, "/options/real-size") != NULL) { if (chirp->real_size > tree_find_integer_property(root, "/options/real-size")) error("chirp: /options/real-size conflicts with note section\n"); } else tree_parse(root, "/options/real-size 0x%lx", (unsigned long)chirp->real_size); /* resolve virt-base */ if (chirp->real_mode) chirp->virt_base = chirp->real_base; else if (note.found == note_correct && note.desc.virt_base != -1) chirp->virt_base = note.desc.virt_base; else if (tree_find_property(root, "/options/virt-base") != NULL) chirp->virt_base = tree_find_integer_property(root, "/options/virt-base"); else chirp->virt_base = CHIRP_START_ADDRESS; if (tree_find_property(root, "/options/virt-base") != NULL) { unsigned_word virt_base = tree_find_integer_property(root, "/options/virt-base"); if (virt_base != -1 && chirp->virt_base != virt_base) error("chirp: /options/virt-base conflicts with note section\n"); } else tree_parse(root, "/options/virt-base 0x%lx", chirp->real_mode ? -1 : (unsigned long)chirp->virt_base); /* resolve virt-size */ chirp->virt_size = chirp->real_size; if (note.found == note_correct && note.desc.virt_size != (signed32)-1 && note.desc.virt_size != 0 && !chirp->real_mode && chirp->virt_size > note.desc.virt_size) error("chirp: insufficent virtual memory for firmware\n"); if (tree_find_property(root, "/options/virt-size") != NULL) { if (chirp->virt_size > tree_find_integer_property(root, "/options/virt-size")) error("chirp: /options/virt-size conflicts with note section\n"); } else tree_parse(root, "/options/virt-size 0x%lx", chirp->real_mode ? -1 : (unsigned long)chirp->virt_size); /* resolve load-base */ if (note.found == note_correct && note.desc.load_base != (signed32)-1) chirp->load_base = note.desc.load_base; else if (tree_find_property(root, "/options/load-base") != NULL) chirp->load_base = tree_find_integer_property(root, "/options/load-base"); else chirp->load_base = CHIRP_LOAD_BASE; if (tree_find_property(root, "/options/load-base") != NULL) { if (chirp->load_base != tree_find_integer_property(root, "/options/load-base")) error("chirp: /options/load-base conflicts with note section\n"); } else tree_parse(root, "/options/load-base 0x%lx", (unsigned long)chirp->load_base); /* now adjust the preliminary firmware addresses to final values */ chirp->code_ra = chirp->code_offset + chirp->real_base; chirp->stack_ra = chirp->stack_offset + chirp->real_base; chirp->htab_ra = chirp->htab_offset + chirp->real_base; /* the virtual addresses. In real mode these are real addresses. */ chirp->code_va = chirp->code_offset + chirp->virt_base; chirp->stack_va = chirp->stack_offset + chirp->virt_base; chirp->htab_va = chirp->htab_offset + chirp->virt_base; chirp->code_client_va = chirp->code_va; chirp->code_client_ra = chirp->code_ra; chirp->code_callback_va = chirp->code_client_va + 16; chirp->code_callback_ra = chirp->code_client_ra + 16; chirp->code_loop_va = chirp->code_callback_va + 16; chirp->code_loop_ra = chirp->code_callback_ra + 16; /* initialization */ tree_parse(root, "/openprom/init"); tree_parse(root, "/openprom/init/register"); tree_parse(root, "/openprom/init/register/0.pc 0x%lx", (unsigned long)bfd_get_start_address(image)); tree_parse(root, "/openprom/init/register/pc 0x%lx", (unsigned long)chirp->code_loop_va); tree_parse(root, "/openprom/init/register/msr 0x%x", (msr_machine_check_enable | (chirp->real_mode ? 0 : (msr_instruction_relocate | msr_data_relocate)) | (chirp->little_endian ? (msr_little_endian_mode | msr_interrupt_little_endian_mode) : 0) | (chirp->floating_point_available ? msr_floating_point_available : 0) | (chirp->interrupt_prefix ? msr_interrupt_prefix : 0) )); tree_parse(root, "/openprom/init/register/sdr1 0x%lx", (unsigned long)(chirp->htab_ra | MASK32(16, 22) | ((chirp->sizeof_htab - 1) >> 16))); /* make certain that the segment registers map straight through */ for (i = 0; i < 16; i++) { tree_parse(root, "/openprom/init/register/sr%d 0x%lx", i, (unsigned long)i); } /* establish an initial state for all processors */ /* the client interface address */ tree_parse(root, "/openprom/init/register/r5 0x%lx", (unsigned long)chirp->code_client_va); /* a stack */ tree_parse(root, "/openprom/init/register/sp 0x%lx", (unsigned long)(chirp->stack_va + chirp->sizeof_stack - 16)); /* in chrp mode any arguments end up being concatinated */ tree_parse(root, "/openprom/init/stack/stack-type chirp"); /* client interface - emul-call followed by return instruction */ node = tree_parse(root, "/openprom/init/data@0x%lx", (unsigned long)chirp->code_client_ra); tree_parse(node, "./psim,description \"client-interface instruction"); tree_parse(node, "./real-address 0x%lx", (unsigned long)chirp->code_client_ra); tree_parse(node, "./data 0x%lx", (unsigned long)emul_call_instruction); node = tree_parse(root, "/openprom/init/data@0x%lx", (unsigned long)(chirp->code_client_ra + 4)); tree_parse(node, "./psim,description \"client-interface return instruction"); tree_parse(node, "./real-address 0x%lx", (unsigned long)(chirp->code_client_ra + 4)); tree_parse(node, "./data 0x%lx", (unsigned long)emul_blr_instruction); /* return address for client callbacks - an emul-call instruction that is again followed by a return instruction */ node = tree_parse(root, "/openprom/init/data@0x%lx", (unsigned long)chirp->code_callback_ra); tree_parse(node, "./psim,description \"client-callback instruction"); tree_parse(node, "./real-address 0x%lx", (unsigned long)chirp->code_callback_ra); tree_parse(node, "./data 0x%lx", (unsigned long)emul_call_instruction); node = tree_parse(root, "/openprom/init/data@0x%lx", (unsigned long)(chirp->code_callback_ra + 4)); tree_parse(node, "./psim,description \"client-callback return instruction"); tree_parse(node, "./real-address 0x%lx", (unsigned long)(chirp->code_callback_ra + 4)); tree_parse(node, "./data 0x%lx", (unsigned long)emul_blr_instruction); /* loop to keep other processors busy */ node = tree_parse(root, "/openprom/init/data@0x%lx", (unsigned long)chirp->code_loop_ra); tree_parse(node, "./psim,description \"processor busy loop"); tree_parse(node, "./real-address 0x%lx", (unsigned long)chirp->code_loop_ra); tree_parse(node, "./data 0x%lx", (unsigned long)emul_loop_instruction); /* hash table */ /* create a hash table */ if (!chirp->real_mode) { node = tree_parse(root, "/openprom/init/htab@0x%lx", (unsigned long)chirp->htab_ra); tree_parse(node, "./claim 0"); tree_parse(node, "./real-address 0x%lx", (unsigned long)chirp->htab_ra); tree_parse(node, "./nr-bytes 0x%lx", (unsigned long)chirp->sizeof_htab); } /* map in the stack */ if (!chirp->real_mode) { node = tree_parse(root, "/openprom/init/htab/pte@0x%lx", (unsigned long)chirp->stack_ra); tree_parse(node, "./psim,description \"map in the stack"); tree_parse(node, "./claim 1"); tree_parse(node, "./virtual-address 0x%lx", (unsigned long)chirp->stack_va); tree_parse(node, "./real-address 0x%lx", (unsigned long)chirp->stack_ra); tree_parse(node, "./nr-bytes 0x%lx", (unsigned long)chirp->sizeof_stack); tree_parse(node, "./wimg %d", 0x7); tree_parse(node, "./pp %d", 0x2); } /* map in the chrp openboot callback code */ if (!chirp->real_mode) { node = tree_parse(root, "/openprom/init/htab/pte@0x%lx", (unsigned long)chirp->code_ra); tree_parse(node, "./psim,description \"map in chrp openboot callback code"); tree_parse(node, "./claim 1"); tree_parse(node, "./virtual-address 0x%lx", (unsigned long)chirp->code_va); tree_parse(node, "./real-address 0x%lx", (unsigned long)chirp->code_ra); tree_parse(node, "./nr-bytes 0x%lx", (unsigned long)chirp->sizeof_code); tree_parse(node, "./wimg %d", 0x7); tree_parse(node, "./pp %d", 0x2); } /* map in the program to run */ if (chirp->real_mode) { node = tree_parse(node, "/openprom/init/load-binary"); tree_parse(node, "./psim,description \"load the binary"); tree_parse(node, "./file-name %s", bfd_get_filename(image)); tree_parse(node, "./claim 1"); } else { node = tree_parse(root, "/openprom/init/htab/pte@0x%lx", (unsigned long)chirp->load_base); tree_parse(node, "./psim,description \"load & map the binary"); tree_parse(node, "./claim 1"); tree_parse(node, "./file-name \"%s", bfd_get_filename(image)); tree_parse(node, "./wimg %d", 0x7); tree_parse(node, "./pp %d", 0x2); } /* map in the interrupt vectors */ if (!chirp->real_mode) { node = tree_parse(root, "/openprom/init/htab/pte@0x0"); tree_parse(node, "./psim,description \"map in interrupt vectors"); tree_parse(node, "./virtual-address 0x0"); tree_parse(node, "./real-address 0x0"); tree_parse(node, "./nr-bytes 0x3000"); tree_parse(node, "./wimg %d", 0x7); tree_parse(node, "./pp %d", 0x2); } return chirp; } static void emul_chirp_init(os_emul_data *emul_data, int nr_cpus) { emul_data->state = serving; } static int emul_chirp_instruction_call(cpu *processor, unsigned_word cia, unsigned_word ra, os_emul_data *emul_data) { unsigned_word service_name_addr; unsigned_word result; char service_buf[32]; char *service_name; chirp_services *service; switch (emul_data->state) { case serving: /* we are waiting on an OpenBoot request from the client program via the client interface */ if (cia != emul_data->code_client_va) return 0; emul_data->return_address = LR; emul_data->arguments = cpu_registers(processor)->gpr[3]; /* try to determine what to do */ service_name_addr = emul_read_word(cpu_registers(processor)->gpr[3], processor, cia); service_name = emul_read_string(service_buf, service_name_addr, sizeof(service_buf), processor, cia); emul_data->n_args = emul_read_word(emul_data->arguments + sizeof(unsigned_cell), processor, cia); emul_data->n_returns = emul_read_word(emul_data->arguments + 2 * sizeof(unsigned_cell), processor, cia); /* verify what was passed */ if (service_name_addr == 0 || service_name == NULL) { error("OpenFirmware called with invalid (NULL) service name from 0x%lx with args 0x%lx\n", (unsigned long)emul_data->return_address, (unsigned long)emul_data->arguments); } if (emul_data->n_args > 6) { /* See iee1275 requirements on nr returns */ error("OpenFirmware service %s called from 0x%lx with args 0x%lx, too many args (%d)\n", (unsigned long)emul_data->return_address, (unsigned long)emul_data->arguments, emul_data->n_returns); } if (emul_data->n_returns > 6) { error("OpenFirmware service %s called from 0x%lx with args 0x%lx, with too many returns (%d)\n", (unsigned long)emul_data->return_address, (unsigned long)emul_data->arguments, emul_data->n_args); } /* look it up */ TRACE(trace_os_emul, ("%s called from 0x%lx with args 0x%lx\n", service_name, (unsigned long)emul_data->return_address, (unsigned long)emul_data->arguments)); service = services; while (service->name != NULL && strcmp(service->name, service_name) != 0) service++; /* found or not? */ if (service->name == NULL) { error("OpenBoot service `%s' not found\n", service_name); TRACE(trace_os_emul, ("%s not found\n", service_name)); cpu_registers(processor)->gpr[3] = -1; } else { emul_data->service = service; /* call upon it */ result = service->handler(emul_data, processor, cia); if (result != 0) TRACE(trace_os_emul, ("%s aborted with %ld\n", service_name, (long)result)); cpu_registers(processor)->gpr[3] = result; } break; default: error("emul_chirp_instruction_call() unknown internal state\n"); result = -1; break; } /* return to caller - instruction following this is a function return */ return 1; } const os_emul emul_chirp = { "chirp", emul_chirp_create, emul_chirp_init, NULL, /*system_call*/ emul_chirp_instruction_call, 0 /*data*/ }; #endif
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