URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [powerpc/] [adder/] [v2_0/] [src/] [redboot_linux_exec.c] - Rev 541
Go to most recent revision | Compare with Previous | Blame | View Log
//========================================================================== // // redboot_linux_boot.c // // RedBoot command to boot Linux // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // Copyright (C) 2002 Gary Thomas // // eCos 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 or (at your option) any later version. // // eCos 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 eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //####OTHERCOPYRIGHTBEGIN#### // // The structure definitions below are taken from include/ppc/platforms/am860.h in // the Linux kernel, Copyright (c) 2002 Gary Thomas, Copyright (c) 1997 Dan Malek. // Their presence here is for the express purpose of communication with the Linux // kernel being booted and is considered 'fair use' by the original author and // are included with their permission. // //####OTHERCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): msalter // Contributors: gthomas,msalter // Date: 2002-01-14 // Purpose: // Description: // // This code is part of RedBoot (tm). // //####DESCRIPTIONEND#### // //========================================================================== #include <redboot.h> #include <pkgconf/hal_powerpc_quicc.h> #include <cyg/hal/hal_arch.h> #include <cyg/hal/hal_if.h> #include <cyg/hal/hal_intr.h> #include <cyg/hal/hal_cache.h> #ifdef CYGPKG_REDBOOT_NETWORKING #include <net/net.h> #endif #ifdef CYGSEM_REDBOOT_HAL_LINUX_BOOT #include CYGHWR_MEMORY_LAYOUT_H //========================================================================= // Exported CLI function(s) static void do_exec(int argc, char *argv[]); RedBoot_cmd("exec", "Execute a Linux image - with MMU off", "[-w timeout]\n" " [-c \"kernel command line\"] [<entry_point>]", do_exec ); //========================================================================= // Imported from Linux kernel include/asm-ppc/am860.h // Copyright (c) 2002 Gary Thomas (gary@chez-thomas.org) // Copyright (c) 1997 Dan Malek (dmalek@jlc.net) // Used with permission of author(s). /* A Board Information structure that is given to a program when * RedBoot starts it up. */ typedef struct bd_info { unsigned int bi_tag; /* Should be 0x42444944 "BDID" */ unsigned int bi_size; /* Size of this structure */ unsigned int bi_revision; /* revision of this structure */ unsigned int bi_bdate; /* EPPCbug date, i.e. 0x11061997 */ unsigned int bi_memstart; /* Memory start address */ unsigned int bi_memsize; /* Memory (end) size in bytes */ unsigned int bi_intfreq; /* Internal Freq, in Hz */ unsigned int bi_busfreq; /* Bus Freq, in Hz */ unsigned int bi_clun; /* Boot device controller */ unsigned int bi_dlun; /* Boot device logical dev */ unsigned char bi_enetaddr[6]; unsigned int bi_baudrate; unsigned char *bi_cmdline; } bd_t; // // Execute a Linux kernel - this is a RedBoot CLI command // static void do_exec(int argc, char *argv[]) { unsigned long entry; bool wait_time_set, cmd_line_set; int wait_time; char *cmd_line; char *cline; struct option_info opts[2]; hal_virtual_comm_table_t *__chan; int baud_rate; bd_t *board_info; CYG_INTERRUPT_STATE oldints; unsigned long sp = CYGMEM_REGION_ram+CYGMEM_REGION_ram_SIZE; init_opts(&opts[0], 'w', true, OPTION_ARG_TYPE_NUM, (void **)&wait_time, (bool *)&wait_time_set, "wait timeout"); init_opts(&opts[1], 'c', true, OPTION_ARG_TYPE_STR, (void **)&cmd_line, (bool *)&cmd_line_set, "kernel command line"); entry = entry_address; // Default from last 'load' operation if (!scan_opts(argc, argv, 1, opts, 2, (void *)&entry, OPTION_ARG_TYPE_NUM, "[physical] starting address")) { return; } // Determine baud rate on current console __chan = CYGACC_CALL_IF_CONSOLE_PROCS(); baud_rate = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_GETBAUD); if (baud_rate <= 0) { baud_rate = CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD; } // Make a little space at the top of the stack, and align to // 64-bit boundary. sp = (sp-128) & ~7; // The Linux boot code uses this space for FIFOs // Copy the commandline onto the stack, and set the SP to just below it. if (cmd_line_set) { int len,i; // get length of string for( len = 0; cmd_line[len] != '\0'; len++ ); // decrement sp by length of string and align to // word boundary. sp = (sp-(len+1)) & ~3; // assign this SP value to command line start cline = (char *)sp; // copy command line over. for( i = 0; i < len; i++ ) cline[i] = cmd_line[i]; cline[len] = '\0'; } else { cline = (char *)NULL; } // Set up parameter struct at top of stack sp = sp-sizeof(bd_t); board_info = (bd_t *)sp; memset(board_info, sizeof(*board_info), 0); board_info->bi_tag = 0x42444944; board_info->bi_size = sizeof(board_info); board_info->bi_revision = 1; board_info->bi_bdate = 0x06012002; board_info->bi_memstart = CYGMEM_REGION_ram; board_info->bi_memsize = CYGMEM_REGION_ram_SIZE; board_info->bi_intfreq = CYGHWR_HAL_POWERPC_BOARD_SPEED*1000000; board_info->bi_busfreq = 66*1000000; board_info->bi_clun = 0; // ???? board_info->bi_dlun = 0; // ???? board_info->bi_baudrate = baud_rate; board_info->bi_cmdline = cline; #ifdef CYGPKG_REDBOOT_NETWORKING memcpy(board_info->bi_enetaddr, __local_enet_addr, sizeof(enet_addr_t)); #endif // adjust SP to 64 bit boundary, and leave a little space // between it and the commandline for PowerPC calling // conventions. sp = (sp-32)&~7; if (wait_time_set) { int script_timeout_ms = wait_time * 1000; #ifdef CYGFUN_REDBOOT_BOOT_SCRIPT unsigned char *hold_script = script; script = (unsigned char *)0; #endif diag_printf("About to start execution at %p - abort with ^C within %d seconds\n", (void *)entry, wait_time); while (script_timeout_ms >= CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT) { int res; char line[80]; res = _rb_gets(line, sizeof(line), CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT); if (res == _GETS_CTRLC) { #ifdef CYGFUN_REDBOOT_BOOT_SCRIPT script = hold_script; // Re-enable script #endif return; } script_timeout_ms -= CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT; } } // Disable interrupts HAL_DISABLE_INTERRUPTS(oldints); // Put the caches to sleep. HAL_DCACHE_SYNC(); HAL_ICACHE_DISABLE(); HAL_DCACHE_DISABLE(); HAL_DCACHE_SYNC(); HAL_ICACHE_INVALIDATE_ALL(); HAL_DCACHE_INVALIDATE_ALL(); // diag_printf("entry %08x, sp %08x, info %08x, cmd line %08x, baud %d\n", // entry, sp, board_info, cline, baud_rate); // breakpoint(); // Call into Linux __asm__ volatile ( // Start by disabling MMU - the mappings are // 1-1 so this should not cause any problems "mfmsr 3\n" "li 4,0xFFFFFFCF\n" "and 3,3,4\n" "sync\n" "mtmsr 3\n" "sync\n" // Now set up parameters to jump into linux "mtlr %0\n" // set entry address in LR "mr 1,%1\n" // set stack pointer "mr 3,%2\n" // set board info in R3 "mr 4,%3\n" // set command line in R4 "blr \n" // jump into linux : : "r"(entry),"r"(sp),"r"(board_info),"r"(cline) : "r3", "r4" ); } #endif // CYGSEM_REDBOOT_HAL_LINUX_BOOT //========================================================================= // EOF redboot_linux_exec.c
Go to most recent revision | Compare with Previous | Blame | View Log