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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Advanced Micro Devices, Inc.
*
* 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; version 2 of the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __ROMCC__
#include <stdint.h>
#include <console/console.h>
#include <cpu/cpu.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/microcode.h>
#include <cpu/x86/cache.h>
#endif
struct microcode {
u32 date_code;
u32 patch_id;
u16 m_patch_data_id;
u8 m_patch_data_len;
u8 init_flag;
u32 m_patch_data_cksum;
u32 nb_dev_id;
u32 ht_io_hub_dev_id;
u16 processor_rev_id;
u8 ht_io_hub_rev_id;
u8 nb_rev_id;
u8 bios_api_rev;
u8 resv1[3];
u32 match_reg[8];
u8 m_patch_data[896];
u8 resv2[896];
u8 x86_code_present;
u8 x86_code_entry[191];
};
static int need_apply_patch(struct microcode *m, u32 equivalent_processor_rev_id)
{
if (m->processor_rev_id != equivalent_processor_rev_id) {
printk_debug("microcode: rev id does not match this patch.\n");
printk_debug("microcode: Not updated! Fix microcode_updates[] \n");
return 0;
}
if (m->nb_dev_id) {
//look at the device id, if not found return;
//if(m->nb_rev_id != installed_nb_rev_id) return 0;
}
if (m->ht_io_hub_dev_id) {
//look at the device id, if not found return;
//if(m->ht_io_hub_rev_id != installed_ht_io_bub_rev_id) return 0;
}
if (m->x86_code_present) {
//if(!x86_code_execute()) return 0;
}
return 1;
}
void amd_update_microcode(void *microcode_updates, u32 equivalent_processor_rev_id)
{
u32 patch_id, new_patch_id;
struct microcode *m;
char *c;
msr_t msr;
msr = rdmsr(0x8b);
patch_id = msr.lo;
printk_debug("microcode: equivalent rev id = 0x%04x, current patch id = 0x%08x\n", equivalent_processor_rev_id, patch_id);
m = microcode_updates;
for(c = microcode_updates; m->date_code; m = (struct microcode *)c) {
if( need_apply_patch(m, equivalent_processor_rev_id) ) {
//apply patch
msr.hi = 0;
msr.lo = (u32)m;
wrmsr(0xc0010020, msr);
printk_debug("microcode: patch id to apply = 0x%08x\n", m->patch_id);
//read the patch_id again
msr = rdmsr(0x8b);
new_patch_id = msr.lo;
printk_debug("microcode: updated to patch id = 0x%08x %s\n", new_patch_id , (new_patch_id == m->patch_id)?" success\n":" fail\n" );
break;
}
c += 2048;
}
}
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