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1275 |
phoenix |
/*
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* Extensible Firmware Interface
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*
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* Based on Extensible Firmware Interface Specification version 0.9 April 30, 1999
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 1999-2003 Hewlett-Packard Co.
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Stephane Eranian <eranian@hpl.hp.com>
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*
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* All EFI Runtime Services are not implemented yet as EFI only
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* supports physical mode addressing on SoftSDV. This is to be fixed
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* in a future version. --drummond 1999-07-20
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*
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* Implemented EFI runtime services and virtual mode calls. --davidm
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*
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* Goutham Rao: <goutham.rao@intel.com>
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* Skip non-WB memory and ignore empty memory ranges.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/time.h>
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#include <linux/proc_fs.h>
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#include <linux/efi.h>
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#include <asm/io.h>
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#include <asm/kregs.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/mca.h>
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#define EFI_DEBUG 0
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extern efi_status_t efi_call_phys (void *, ...);
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struct efi efi;
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static efi_runtime_services_t *runtime;
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/*
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* efi_dir is allocated here, but the directory isn't created
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* here, as proc_mkdir() doesn't work this early in the bootup
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* process. Therefore, each module, like efivars, must test for
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* if (!efi_dir) efi_dir = proc_mkdir("efi", NULL);
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* prior to creating their own entries under /proc/efi.
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*/
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *efi_dir;
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#endif
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static unsigned long mem_limit = ~0UL;
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#define efi_call_virt(f, args...) (*(f))(args)
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#define STUB_GET_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), adjust_arg(tm), \
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adjust_arg(tc)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_SET_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_set_time (efi_time_t *tm) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), adjust_arg(tm)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \
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adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \
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enabled, adjust_arg(tm)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_VARIABLE(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \
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unsigned long *data_size, void *data) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_get_variable_t *) __va(runtime->get_variable), \
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adjust_arg(name), adjust_arg(vendor), adjust_arg(attr), \
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adjust_arg(data_size), adjust_arg(data)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_get_next_variable_t *) __va(runtime->get_next_variable), \
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adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_SET_VARIABLE(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, u32 attr, \
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unsigned long data_size, void *data) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_set_variable_t *) __va(runtime->set_variable), \
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adjust_arg(name), adjust_arg(vendor), attr, data_size, \
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adjust_arg(data)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_next_high_mono_count (u64 *count) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \
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__va(runtime->get_next_high_mono_count), adjust_arg(count)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_RESET_SYSTEM(prefix, adjust_arg) \
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static void \
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prefix##_reset_system (int reset_type, efi_status_t status, \
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unsigned long data_size, efi_char16_t *data) \
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{ \
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struct ia64_fpreg fr[6]; \
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\
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ia64_save_scratch_fpregs(fr); \
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efi_call_##prefix((efi_reset_system_t *) __va(runtime->reset_system), \
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reset_type, status, data_size, adjust_arg(data)); \
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/* should not return, but just in case... */ \
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ia64_load_scratch_fpregs(fr); \
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}
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| 186 |
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STUB_GET_TIME(phys, __pa)
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STUB_SET_TIME(phys, __pa)
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STUB_GET_WAKEUP_TIME(phys, __pa)
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STUB_SET_WAKEUP_TIME(phys, __pa)
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STUB_GET_VARIABLE(phys, __pa)
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STUB_GET_NEXT_VARIABLE(phys, __pa)
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STUB_SET_VARIABLE(phys, __pa)
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STUB_GET_NEXT_HIGH_MONO_COUNT(phys, __pa)
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STUB_RESET_SYSTEM(phys, __pa)
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| 196 |
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STUB_GET_TIME(virt, )
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| 197 |
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STUB_SET_TIME(virt, )
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STUB_GET_WAKEUP_TIME(virt, )
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STUB_SET_WAKEUP_TIME(virt, )
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STUB_GET_VARIABLE(virt, )
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STUB_GET_NEXT_VARIABLE(virt, )
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STUB_SET_VARIABLE(virt, )
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STUB_GET_NEXT_HIGH_MONO_COUNT(virt, )
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STUB_RESET_SYSTEM(virt, )
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| 206 |
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void
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| 207 |
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efi_gettimeofday (struct timeval *tv)
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| 208 |
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{
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| 209 |
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efi_time_t tm;
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| 210 |
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| 211 |
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memset(tv, 0, sizeof(tv));
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| 212 |
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if ((*efi.get_time)(&tm, 0) != EFI_SUCCESS)
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| 213 |
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return;
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| 214 |
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| 215 |
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tv->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
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| 216 |
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tv->tv_usec = tm.nanosecond / 1000;
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| 217 |
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}
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| 218 |
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| 219 |
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static int
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| 220 |
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is_available_memory (efi_memory_desc_t *md)
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| 221 |
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{
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| 222 |
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if (!(md->attribute & EFI_MEMORY_WB))
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| 223 |
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return 0;
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| 224 |
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| 225 |
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switch (md->type) {
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| 226 |
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case EFI_LOADER_CODE:
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| 227 |
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case EFI_LOADER_DATA:
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| 228 |
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case EFI_BOOT_SERVICES_CODE:
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| 229 |
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case EFI_BOOT_SERVICES_DATA:
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| 230 |
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case EFI_CONVENTIONAL_MEMORY:
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| 231 |
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return 1;
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| 232 |
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}
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| 233 |
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return 0;
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| 234 |
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}
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| 235 |
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| 236 |
|
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/*
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| 237 |
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* Trim descriptor MD so its starts at address START_ADDR. If the descriptor covers
|
| 238 |
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* memory that is normally available to the kernel, issue a warning that some memory
|
| 239 |
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* is being ignored.
|
| 240 |
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*/
|
| 241 |
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static void
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| 242 |
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trim_bottom (efi_memory_desc_t *md, u64 start_addr)
|
| 243 |
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{
|
| 244 |
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u64 num_skipped_pages;
|
| 245 |
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|
| 246 |
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if (md->phys_addr >= start_addr || !md->num_pages)
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| 247 |
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return;
|
| 248 |
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|
|
| 249 |
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num_skipped_pages = (start_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
|
| 250 |
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if (num_skipped_pages > md->num_pages)
|
| 251 |
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num_skipped_pages = md->num_pages;
|
| 252 |
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|
| 253 |
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if (is_available_memory(md))
|
| 254 |
|
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printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
|
| 255 |
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"at 0x%lx\n", __FUNCTION__,
|
| 256 |
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(num_skipped_pages << EFI_PAGE_SHIFT) >> 10,
|
| 257 |
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md->phys_addr, start_addr - IA64_GRANULE_SIZE);
|
| 258 |
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/*
|
| 259 |
|
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* NOTE: Don't set md->phys_addr to START_ADDR because that could cause the memory
|
| 260 |
|
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* descriptor list to become unsorted. In such a case, md->num_pages will be
|
| 261 |
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* zero, so the Right Thing will happen.
|
| 262 |
|
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*/
|
| 263 |
|
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md->phys_addr += num_skipped_pages << EFI_PAGE_SHIFT;
|
| 264 |
|
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md->num_pages -= num_skipped_pages;
|
| 265 |
|
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}
|
| 266 |
|
|
|
| 267 |
|
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static void
|
| 268 |
|
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trim_top (efi_memory_desc_t *md, u64 end_addr)
|
| 269 |
|
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{
|
| 270 |
|
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u64 num_dropped_pages, md_end_addr;
|
| 271 |
|
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|
| 272 |
|
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md_end_addr = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
|
| 273 |
|
|
|
| 274 |
|
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if (md_end_addr <= end_addr || !md->num_pages)
|
| 275 |
|
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return;
|
| 276 |
|
|
|
| 277 |
|
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num_dropped_pages = (md_end_addr - end_addr) >> EFI_PAGE_SHIFT;
|
| 278 |
|
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if (num_dropped_pages > md->num_pages)
|
| 279 |
|
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num_dropped_pages = md->num_pages;
|
| 280 |
|
|
|
| 281 |
|
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if (is_available_memory(md))
|
| 282 |
|
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printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
|
| 283 |
|
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"at 0x%lx\n", __FUNCTION__,
|
| 284 |
|
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(num_dropped_pages << EFI_PAGE_SHIFT) >> 10,
|
| 285 |
|
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md->phys_addr, end_addr);
|
| 286 |
|
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md->num_pages -= num_dropped_pages;
|
| 287 |
|
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}
|
| 288 |
|
|
|
| 289 |
|
|
/*
|
| 290 |
|
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* Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that
|
| 291 |
|
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* has memory that is available for OS use.
|
| 292 |
|
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*/
|
| 293 |
|
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void
|
| 294 |
|
|
efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
|
| 295 |
|
|
{
|
| 296 |
|
|
int prev_valid = 0;
|
| 297 |
|
|
struct range {
|
| 298 |
|
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u64 start;
|
| 299 |
|
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u64 end;
|
| 300 |
|
|
} prev, curr;
|
| 301 |
|
|
void *efi_map_start, *efi_map_end, *p, *q;
|
| 302 |
|
|
efi_memory_desc_t *md, *check_md;
|
| 303 |
|
|
u64 efi_desc_size, start, end, granule_addr, last_granule_addr, first_non_wb_addr = 0;
|
| 304 |
|
|
|
| 305 |
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
| 306 |
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
| 307 |
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
| 308 |
|
|
|
| 309 |
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
| 310 |
|
|
md = p;
|
| 311 |
|
|
|
| 312 |
|
|
/* skip over non-WB memory descriptors; that's all we're interested in... */
|
| 313 |
|
|
if (!(md->attribute & EFI_MEMORY_WB))
|
| 314 |
|
|
continue;
|
| 315 |
|
|
|
| 316 |
|
|
/*
|
| 317 |
|
|
* granule_addr is the base of md's first granule.
|
| 318 |
|
|
* [granule_addr - first_non_wb_addr) is guaranteed to
|
| 319 |
|
|
* be contiguous WB memory.
|
| 320 |
|
|
*/
|
| 321 |
|
|
granule_addr = md->phys_addr & ~(IA64_GRANULE_SIZE - 1);
|
| 322 |
|
|
first_non_wb_addr = max(first_non_wb_addr, granule_addr);
|
| 323 |
|
|
|
| 324 |
|
|
if (first_non_wb_addr < md->phys_addr) {
|
| 325 |
|
|
trim_bottom(md, granule_addr + IA64_GRANULE_SIZE);
|
| 326 |
|
|
granule_addr = md->phys_addr & ~(IA64_GRANULE_SIZE - 1);
|
| 327 |
|
|
first_non_wb_addr = max(first_non_wb_addr, granule_addr);
|
| 328 |
|
|
}
|
| 329 |
|
|
|
| 330 |
|
|
for (q = p; q < efi_map_end; q += efi_desc_size) {
|
| 331 |
|
|
check_md = q;
|
| 332 |
|
|
|
| 333 |
|
|
if ((check_md->attribute & EFI_MEMORY_WB) &&
|
| 334 |
|
|
(check_md->phys_addr == first_non_wb_addr))
|
| 335 |
|
|
first_non_wb_addr += check_md->num_pages << EFI_PAGE_SHIFT;
|
| 336 |
|
|
else
|
| 337 |
|
|
break; /* non-WB or hole */
|
| 338 |
|
|
}
|
| 339 |
|
|
|
| 340 |
|
|
last_granule_addr = first_non_wb_addr & ~(IA64_GRANULE_SIZE - 1);
|
| 341 |
|
|
if (last_granule_addr < md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT))
|
| 342 |
|
|
trim_top(md, last_granule_addr);
|
| 343 |
|
|
|
| 344 |
|
|
if (is_available_memory(md)) {
|
| 345 |
|
|
if (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) > mem_limit) {
|
| 346 |
|
|
if (md->phys_addr > mem_limit)
|
| 347 |
|
|
continue;
|
| 348 |
|
|
md->num_pages = (mem_limit - md->phys_addr) >> EFI_PAGE_SHIFT;
|
| 349 |
|
|
}
|
| 350 |
|
|
|
| 351 |
|
|
if (md->num_pages == 0)
|
| 352 |
|
|
continue;
|
| 353 |
|
|
|
| 354 |
|
|
curr.start = PAGE_OFFSET + md->phys_addr;
|
| 355 |
|
|
curr.end = curr.start + (md->num_pages << EFI_PAGE_SHIFT);
|
| 356 |
|
|
|
| 357 |
|
|
if (!prev_valid) {
|
| 358 |
|
|
prev = curr;
|
| 359 |
|
|
prev_valid = 1;
|
| 360 |
|
|
} else {
|
| 361 |
|
|
if (curr.start < prev.start)
|
| 362 |
|
|
printk(KERN_ERR "Oops: EFI memory table not ordered!\n");
|
| 363 |
|
|
|
| 364 |
|
|
if (prev.end == curr.start) {
|
| 365 |
|
|
/* merge two consecutive memory ranges */
|
| 366 |
|
|
prev.end = curr.end;
|
| 367 |
|
|
} else {
|
| 368 |
|
|
start = PAGE_ALIGN(prev.start);
|
| 369 |
|
|
end = prev.end & PAGE_MASK;
|
| 370 |
|
|
if ((end > start) && (*callback)(start, end, arg) < 0)
|
| 371 |
|
|
return;
|
| 372 |
|
|
prev = curr;
|
| 373 |
|
|
}
|
| 374 |
|
|
}
|
| 375 |
|
|
}
|
| 376 |
|
|
}
|
| 377 |
|
|
if (prev_valid) {
|
| 378 |
|
|
start = PAGE_ALIGN(prev.start);
|
| 379 |
|
|
end = prev.end & PAGE_MASK;
|
| 380 |
|
|
if (end > start)
|
| 381 |
|
|
(*callback)(start, end, arg);
|
| 382 |
|
|
}
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
/*
|
| 386 |
|
|
* Look for the PAL_CODE region reported by EFI and maps it using an
|
| 387 |
|
|
* ITR to enable safe PAL calls in virtual mode. See IA-64 Processor
|
| 388 |
|
|
* Abstraction Layer chapter 11 in ADAG
|
| 389 |
|
|
*/
|
| 390 |
|
|
void
|
| 391 |
|
|
efi_map_pal_code (void)
|
| 392 |
|
|
{
|
| 393 |
|
|
void *efi_map_start, *efi_map_end, *p;
|
| 394 |
|
|
efi_memory_desc_t *md;
|
| 395 |
|
|
u64 efi_desc_size;
|
| 396 |
|
|
int pal_code_count = 0;
|
| 397 |
|
|
u64 mask, psr;
|
| 398 |
|
|
u64 vaddr;
|
| 399 |
|
|
#ifdef CONFIG_IA64_MCA
|
| 400 |
|
|
int cpu;
|
| 401 |
|
|
#endif
|
| 402 |
|
|
|
| 403 |
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
| 404 |
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
| 405 |
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
| 406 |
|
|
|
| 407 |
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
| 408 |
|
|
md = p;
|
| 409 |
|
|
if (md->type != EFI_PAL_CODE)
|
| 410 |
|
|
continue;
|
| 411 |
|
|
|
| 412 |
|
|
if (++pal_code_count > 1) {
|
| 413 |
|
|
printk(KERN_ERR "Too many EFI Pal Code memory ranges, dropped @ %lx\n",
|
| 414 |
|
|
md->phys_addr);
|
| 415 |
|
|
continue;
|
| 416 |
|
|
}
|
| 417 |
|
|
/*
|
| 418 |
|
|
* The only ITLB entry in region 7 that is used is the one installed by
|
| 419 |
|
|
* __start(). That entry covers a 64MB range.
|
| 420 |
|
|
*/
|
| 421 |
|
|
mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
|
| 422 |
|
|
vaddr = PAGE_OFFSET + md->phys_addr;
|
| 423 |
|
|
|
| 424 |
|
|
/*
|
| 425 |
|
|
* We must check that the PAL mapping won't overlap with the kernel
|
| 426 |
|
|
* mapping.
|
| 427 |
|
|
*
|
| 428 |
|
|
* PAL code is guaranteed to be aligned on a power of 2 between 4k and
|
| 429 |
|
|
* 256KB and that only one ITR is needed to map it. This implies that the
|
| 430 |
|
|
* PAL code is always aligned on its size, i.e., the closest matching page
|
| 431 |
|
|
* size supported by the TLB. Therefore PAL code is guaranteed never to
|
| 432 |
|
|
* cross a 64MB unless it is bigger than 64MB (very unlikely!). So for
|
| 433 |
|
|
* now the following test is enough to determine whether or not we need a
|
| 434 |
|
|
* dedicated ITR for the PAL code.
|
| 435 |
|
|
*/
|
| 436 |
|
|
if ((vaddr & mask) == (KERNEL_START & mask)) {
|
| 437 |
|
|
printk(KERN_INFO "%s: no need to install ITR for PAL code\n",
|
| 438 |
|
|
__FUNCTION__);
|
| 439 |
|
|
continue;
|
| 440 |
|
|
}
|
| 441 |
|
|
|
| 442 |
|
|
if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE)
|
| 443 |
|
|
panic("Woah! PAL code size bigger than a granule!");
|
| 444 |
|
|
|
| 445 |
|
|
mask = ~((1 << IA64_GRANULE_SHIFT) - 1);
|
| 446 |
|
|
#if EFI_DEBUG
|
| 447 |
|
|
printk(KERN_INFO "CPU %d: mapping PAL code [0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
|
| 448 |
|
|
smp_processor_id(), md->phys_addr,
|
| 449 |
|
|
md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
|
| 450 |
|
|
vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
|
| 451 |
|
|
#endif
|
| 452 |
|
|
|
| 453 |
|
|
/*
|
| 454 |
|
|
* Cannot write to CRx with PSR.ic=1
|
| 455 |
|
|
*/
|
| 456 |
|
|
psr = ia64_clear_ic();
|
| 457 |
|
|
ia64_itr(0x1, IA64_TR_PALCODE, vaddr & mask,
|
| 458 |
|
|
pte_val(mk_pte_phys(md->phys_addr, PAGE_KERNEL)), IA64_GRANULE_SHIFT);
|
| 459 |
|
|
ia64_set_psr(psr); /* restore psr */
|
| 460 |
|
|
ia64_srlz_i();
|
| 461 |
|
|
|
| 462 |
|
|
#ifdef CONFIG_IA64_MCA
|
| 463 |
|
|
cpu = smp_processor_id();
|
| 464 |
|
|
|
| 465 |
|
|
/* insert this TR into our list for MCA recovery purposes */
|
| 466 |
|
|
ia64_mca_tlb_list[cpu].pal_base=vaddr & mask;
|
| 467 |
|
|
ia64_mca_tlb_list[cpu].pal_paddr= pte_val(mk_pte_phys(md->phys_addr, PAGE_KERNEL));
|
| 468 |
|
|
#endif
|
| 469 |
|
|
}
|
| 470 |
|
|
}
|
| 471 |
|
|
|
| 472 |
|
|
void __init
|
| 473 |
|
|
efi_init (void)
|
| 474 |
|
|
{
|
| 475 |
|
|
void *efi_map_start, *efi_map_end;
|
| 476 |
|
|
efi_config_table_t *config_tables;
|
| 477 |
|
|
efi_char16_t *c16;
|
| 478 |
|
|
u64 efi_desc_size;
|
| 479 |
|
|
char *cp, *end, vendor[100] = "unknown";
|
| 480 |
|
|
extern char saved_command_line[];
|
| 481 |
|
|
int i;
|
| 482 |
|
|
|
| 483 |
|
|
/* it's too early to be able to use the standard kernel command line support... */
|
| 484 |
|
|
for (cp = saved_command_line; *cp; ) {
|
| 485 |
|
|
if (memcmp(cp, "mem=", 4) == 0) {
|
| 486 |
|
|
cp += 4;
|
| 487 |
|
|
mem_limit = memparse(cp, &end) - 1;
|
| 488 |
|
|
if (end != cp)
|
| 489 |
|
|
break;
|
| 490 |
|
|
cp = end;
|
| 491 |
|
|
} else {
|
| 492 |
|
|
while (*cp != ' ' && *cp)
|
| 493 |
|
|
++cp;
|
| 494 |
|
|
while (*cp == ' ')
|
| 495 |
|
|
++cp;
|
| 496 |
|
|
}
|
| 497 |
|
|
}
|
| 498 |
|
|
if (mem_limit != ~0UL)
|
| 499 |
|
|
printk(KERN_INFO "Ignoring memory above %luMB\n", mem_limit >> 20);
|
| 500 |
|
|
|
| 501 |
|
|
efi.systab = __va(ia64_boot_param->efi_systab);
|
| 502 |
|
|
|
| 503 |
|
|
/*
|
| 504 |
|
|
* Verify the EFI Table
|
| 505 |
|
|
*/
|
| 506 |
|
|
if (efi.systab == NULL)
|
| 507 |
|
|
panic("Woah! Can't find EFI system table.\n");
|
| 508 |
|
|
if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
|
| 509 |
|
|
panic("Woah! EFI system table signature incorrect\n");
|
| 510 |
|
|
if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0)
|
| 511 |
|
|
printk(KERN_WARNING "Warning: EFI system table major version mismatch: "
|
| 512 |
|
|
"got %d.%02d, expected %d.%02d\n",
|
| 513 |
|
|
efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff,
|
| 514 |
|
|
EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff);
|
| 515 |
|
|
|
| 516 |
|
|
config_tables = __va(efi.systab->tables);
|
| 517 |
|
|
|
| 518 |
|
|
/* Show what we know for posterity */
|
| 519 |
|
|
c16 = __va(efi.systab->fw_vendor);
|
| 520 |
|
|
if (c16) {
|
| 521 |
|
|
for (i = 0;i < sizeof(vendor) && *c16; ++i)
|
| 522 |
|
|
vendor[i] = *c16++;
|
| 523 |
|
|
vendor[i] = '\0';
|
| 524 |
|
|
}
|
| 525 |
|
|
|
| 526 |
|
|
printk(KERN_INFO "EFI v%u.%.02u by %s:",
|
| 527 |
|
|
efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor);
|
| 528 |
|
|
|
| 529 |
|
|
for (i = 0; i < efi.systab->nr_tables; i++) {
|
| 530 |
|
|
if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
|
| 531 |
|
|
efi.mps = __va(config_tables[i].table);
|
| 532 |
|
|
printk(" MPS=0x%lx", config_tables[i].table);
|
| 533 |
|
|
} else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
|
| 534 |
|
|
efi.acpi20 = __va(config_tables[i].table);
|
| 535 |
|
|
printk(" ACPI 2.0=0x%lx", config_tables[i].table);
|
| 536 |
|
|
} else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
|
| 537 |
|
|
efi.acpi = __va(config_tables[i].table);
|
| 538 |
|
|
printk(" ACPI=0x%lx", config_tables[i].table);
|
| 539 |
|
|
} else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
|
| 540 |
|
|
efi.smbios = __va(config_tables[i].table);
|
| 541 |
|
|
printk(" SMBIOS=0x%lx", config_tables[i].table);
|
| 542 |
|
|
} else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
|
| 543 |
|
|
efi.sal_systab = __va(config_tables[i].table);
|
| 544 |
|
|
printk(" SALsystab=0x%lx", config_tables[i].table);
|
| 545 |
|
|
} else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
|
| 546 |
|
|
efi.hcdp = __va(config_tables[i].table);
|
| 547 |
|
|
printk(" HCDP=0x%lx", config_tables[i].table);
|
| 548 |
|
|
}
|
| 549 |
|
|
}
|
| 550 |
|
|
printk("\n");
|
| 551 |
|
|
|
| 552 |
|
|
runtime = __va(efi.systab->runtime);
|
| 553 |
|
|
efi.get_time = phys_get_time;
|
| 554 |
|
|
efi.set_time = phys_set_time;
|
| 555 |
|
|
efi.get_wakeup_time = phys_get_wakeup_time;
|
| 556 |
|
|
efi.set_wakeup_time = phys_set_wakeup_time;
|
| 557 |
|
|
efi.get_variable = phys_get_variable;
|
| 558 |
|
|
efi.get_next_variable = phys_get_next_variable;
|
| 559 |
|
|
efi.set_variable = phys_set_variable;
|
| 560 |
|
|
efi.get_next_high_mono_count = phys_get_next_high_mono_count;
|
| 561 |
|
|
efi.reset_system = phys_reset_system;
|
| 562 |
|
|
|
| 563 |
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
| 564 |
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
| 565 |
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
| 566 |
|
|
|
| 567 |
|
|
#if EFI_DEBUG
|
| 568 |
|
|
/* print EFI memory map: */
|
| 569 |
|
|
{
|
| 570 |
|
|
efi_memory_desc_t *md;
|
| 571 |
|
|
void *p;
|
| 572 |
|
|
|
| 573 |
|
|
for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) {
|
| 574 |
|
|
md = p;
|
| 575 |
|
|
printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n",
|
| 576 |
|
|
i, md->type, md->attribute, md->phys_addr,
|
| 577 |
|
|
md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
|
| 578 |
|
|
md->num_pages >> (20 - EFI_PAGE_SHIFT));
|
| 579 |
|
|
}
|
| 580 |
|
|
}
|
| 581 |
|
|
#endif
|
| 582 |
|
|
|
| 583 |
|
|
efi_map_pal_code();
|
| 584 |
|
|
efi_enter_virtual_mode();
|
| 585 |
|
|
}
|
| 586 |
|
|
|
| 587 |
|
|
void
|
| 588 |
|
|
efi_enter_virtual_mode (void)
|
| 589 |
|
|
{
|
| 590 |
|
|
void *efi_map_start, *efi_map_end, *p;
|
| 591 |
|
|
efi_memory_desc_t *md;
|
| 592 |
|
|
efi_status_t status;
|
| 593 |
|
|
u64 efi_desc_size;
|
| 594 |
|
|
|
| 595 |
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
| 596 |
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
| 597 |
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
| 598 |
|
|
|
| 599 |
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
| 600 |
|
|
md = p;
|
| 601 |
|
|
if (md->attribute & EFI_MEMORY_RUNTIME) {
|
| 602 |
|
|
/*
|
| 603 |
|
|
* Some descriptors have multiple bits set, so the order of
|
| 604 |
|
|
* the tests is relevant.
|
| 605 |
|
|
*/
|
| 606 |
|
|
if (md->attribute & EFI_MEMORY_WB) {
|
| 607 |
|
|
md->virt_addr = (u64) __va(md->phys_addr);
|
| 608 |
|
|
} else if (md->attribute & EFI_MEMORY_UC) {
|
| 609 |
|
|
md->virt_addr = (u64) ioremap(md->phys_addr, 0);
|
| 610 |
|
|
} else if (md->attribute & EFI_MEMORY_WC) {
|
| 611 |
|
|
#if 0
|
| 612 |
|
|
md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
|
| 613 |
|
|
| _PAGE_D
|
| 614 |
|
|
| _PAGE_MA_WC
|
| 615 |
|
|
| _PAGE_PL_0
|
| 616 |
|
|
| _PAGE_AR_RW));
|
| 617 |
|
|
#else
|
| 618 |
|
|
printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
|
| 619 |
|
|
md->virt_addr = (u64) ioremap(md->phys_addr, 0);
|
| 620 |
|
|
#endif
|
| 621 |
|
|
} else if (md->attribute & EFI_MEMORY_WT) {
|
| 622 |
|
|
#if 0
|
| 623 |
|
|
md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
|
| 624 |
|
|
| _PAGE_D | _PAGE_MA_WT
|
| 625 |
|
|
| _PAGE_PL_0
|
| 626 |
|
|
| _PAGE_AR_RW));
|
| 627 |
|
|
#else
|
| 628 |
|
|
printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
|
| 629 |
|
|
md->virt_addr = (u64) ioremap(md->phys_addr, 0);
|
| 630 |
|
|
#endif
|
| 631 |
|
|
}
|
| 632 |
|
|
}
|
| 633 |
|
|
}
|
| 634 |
|
|
|
| 635 |
|
|
status = efi_call_phys(__va(runtime->set_virtual_address_map),
|
| 636 |
|
|
ia64_boot_param->efi_memmap_size,
|
| 637 |
|
|
efi_desc_size, ia64_boot_param->efi_memdesc_version,
|
| 638 |
|
|
ia64_boot_param->efi_memmap);
|
| 639 |
|
|
if (status != EFI_SUCCESS) {
|
| 640 |
|
|
printk(KERN_WARNING "warning: unable to switch EFI into virtual mode (status=0x%lx)\n", status);
|
| 641 |
|
|
return;
|
| 642 |
|
|
}
|
| 643 |
|
|
|
| 644 |
|
|
/*
|
| 645 |
|
|
* Now that EFI is in virtual mode, we call the EFI functions more efficiently:
|
| 646 |
|
|
*/
|
| 647 |
|
|
efi.get_time = virt_get_time;
|
| 648 |
|
|
efi.set_time = virt_set_time;
|
| 649 |
|
|
efi.get_wakeup_time = virt_get_wakeup_time;
|
| 650 |
|
|
efi.set_wakeup_time = virt_set_wakeup_time;
|
| 651 |
|
|
efi.get_variable = virt_get_variable;
|
| 652 |
|
|
efi.get_next_variable = virt_get_next_variable;
|
| 653 |
|
|
efi.set_variable = virt_set_variable;
|
| 654 |
|
|
efi.get_next_high_mono_count = virt_get_next_high_mono_count;
|
| 655 |
|
|
efi.reset_system = virt_reset_system;
|
| 656 |
|
|
}
|
| 657 |
|
|
|
| 658 |
|
|
/*
|
| 659 |
|
|
* Walk the EFI memory map looking for the I/O port range. There can only be one entry of
|
| 660 |
|
|
* this type, other I/O port ranges should be described via ACPI.
|
| 661 |
|
|
*/
|
| 662 |
|
|
u64
|
| 663 |
|
|
efi_get_iobase (void)
|
| 664 |
|
|
{
|
| 665 |
|
|
void *efi_map_start, *efi_map_end, *p;
|
| 666 |
|
|
efi_memory_desc_t *md;
|
| 667 |
|
|
u64 efi_desc_size;
|
| 668 |
|
|
|
| 669 |
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
| 670 |
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
| 671 |
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
| 672 |
|
|
|
| 673 |
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
| 674 |
|
|
md = p;
|
| 675 |
|
|
if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
|
| 676 |
|
|
/* paranoia attribute checking */
|
| 677 |
|
|
if (md->attribute == (EFI_MEMORY_UC | EFI_MEMORY_RUNTIME))
|
| 678 |
|
|
return md->phys_addr;
|
| 679 |
|
|
}
|
| 680 |
|
|
}
|
| 681 |
|
|
return 0;
|
| 682 |
|
|
}
|
| 683 |
|
|
|
| 684 |
|
|
u32
|
| 685 |
|
|
efi_mem_type (unsigned long phys_addr)
|
| 686 |
|
|
{
|
| 687 |
|
|
void *efi_map_start, *efi_map_end, *p;
|
| 688 |
|
|
efi_memory_desc_t *md;
|
| 689 |
|
|
u64 efi_desc_size;
|
| 690 |
|
|
|
| 691 |
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
| 692 |
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
| 693 |
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
| 694 |
|
|
|
| 695 |
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
| 696 |
|
|
md = p;
|
| 697 |
|
|
|
| 698 |
|
|
if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
|
| 699 |
|
|
return md->type;
|
| 700 |
|
|
}
|
| 701 |
|
|
return 0;
|
| 702 |
|
|
}
|
| 703 |
|
|
|
| 704 |
|
|
u64
|
| 705 |
|
|
efi_mem_attributes (unsigned long phys_addr)
|
| 706 |
|
|
{
|
| 707 |
|
|
void *efi_map_start, *efi_map_end, *p;
|
| 708 |
|
|
efi_memory_desc_t *md;
|
| 709 |
|
|
u64 efi_desc_size;
|
| 710 |
|
|
|
| 711 |
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
| 712 |
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
| 713 |
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
| 714 |
|
|
|
| 715 |
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
| 716 |
|
|
md = p;
|
| 717 |
|
|
|
| 718 |
|
|
if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
|
| 719 |
|
|
return md->attribute;
|
| 720 |
|
|
}
|
| 721 |
|
|
return 0;
|
| 722 |
|
|
}
|
| 723 |
|
|
|
| 724 |
|
|
static void __exit
|
| 725 |
|
|
efivars_exit (void)
|
| 726 |
|
|
{
|
| 727 |
|
|
#ifdef CONFIG_PROC_FS
|
| 728 |
|
|
remove_proc_entry(efi_dir->name, NULL);
|
| 729 |
|
|
#endif
|
| 730 |
|
|
}
|
