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https://github.com/Telecominfraproject/OpenCellular.git
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2006b38fed
Signed-off-by: Marc Jones <marc.jones@amd.com> Reviewed-by: Jordan Crouse <jordan.crouse@amd.com> Acked-by: Myles Watson <myles@pel.cs.byu.edu> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3013 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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* This file is part of the LinuxBIOS project.
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*
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* Copyright (C) 2007 Advanced Micro Devices, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include <console/console.h>
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#include <cpu/cpu.h>
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#include <cpu/x86/msr.h>
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#include <cpu/amd/microcode.h>
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#include <cpu/x86/cache.h>
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struct microcode {
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u32 date_code;
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u32 patch_id;
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u16 m_patch_data_id;
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u8 m_patch_data_len;
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u8 init_flag;
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u32 m_patch_data_cksum;
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u32 nb_dev_id;
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u32 ht_io_hub_dev_id;
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u16 processor_rev_id;
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u8 ht_io_hub_rev_id;
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u8 nb_rev_id;
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u8 bios_api_rev;
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u8 resv1[3];
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u32 match_reg[8];
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u8 m_patch_data[896];
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u8 resv2[896];
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u8 x86_code_present;
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u8 x86_code_entry[191];
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};
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static int need_apply_patch(struct microcode *m, u32 equivalent_processor_rev_id)
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{
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if (m->processor_rev_id != equivalent_processor_rev_id) return 0;
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if (m->nb_dev_id) {
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//look at the device id, if not found return;
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//if(m->nb_rev_id != installed_nb_rev_id) return 0;
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}
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if (m->ht_io_hub_dev_id) {
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//look at the device id, if not found return;
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//if(m->ht_io_hub_rev_id != installed_ht_io_bub_rev_id) return 0;
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}
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if (m->x86_code_present) {
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//if(!x86_code_execute()) return 0;
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}
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return 1;
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}
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void amd_update_microcode(void *microcode_updates, u32 equivalent_processor_rev_id)
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{
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u32 patch_id, new_patch_id;
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struct microcode *m;
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char *c;
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msr_t msr;
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msr = rdmsr(0x8b);
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patch_id = msr.lo;
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printk_debug("microcode: equivalent processor rev id = 0x%04x, patch id = 0x%08x\n", equivalent_processor_rev_id, patch_id);
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m = microcode_updates;
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for(c = microcode_updates; m->date_code; m = (struct microcode *)c) {
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if( need_apply_patch(m, equivalent_processor_rev_id) ) {
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//apply patch
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msr.hi = 0;
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msr.lo = (u32)m;
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wrmsr(0xc0010020, msr);
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printk_debug("microcode: patch id that want to apply= 0x%08x\n", m->patch_id);
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//read the patch_id again
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msr = rdmsr(0x8b);
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new_patch_id = msr.lo;
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printk_debug("microcode: updated to patch id = 0x%08x %s\r\n", new_patch_id , (new_patch_id == m->patch_id)?" success":" fail" );
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break;
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}
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c += 2048;
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}
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}
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