Revamp Intel microcode update code
- add GPLv2 + copyright header after talking to Ron - "bits" in struct microcode served no real purpose but getting its address taken. Hence drop it - use asm volatile instead of __asm__ volatile - drop superfluous wrmsr (that seems to be harmless but is still wrong) in read_microcode_rev - use u32 instead of unsigned int where appropriate - make code usable both in bootblock and in ramstage - drop ROMCC style print_debug statements - drop microcode update copy in Sandybridge bootblock Change-Id: Iec4d5c7bfac210194caf577e8d72446e6dfb4b86 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/928 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
parent
05e740fc40
commit
3f8989ebbc
|
@ -1,6 +1,24 @@
|
|||
/* microcode.c: Microcode update for PIII and later CPUS
|
||||
/*
|
||||
* This file is part of the coreboot project.
|
||||
*
|
||||
* Copyright (C) 2000 Ronald G. Minnich
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
/* Microcode update for Intel PIII and later CPUs */
|
||||
|
||||
#include <stdint.h>
|
||||
#include <console/console.h>
|
||||
#include <cpu/cpu.h>
|
||||
|
@ -9,30 +27,28 @@
|
|||
|
||||
struct microcode {
|
||||
u32 hdrver; /* Header Version */
|
||||
u32 rev; /* Patch ID */
|
||||
u32 date; /* DATE */
|
||||
u32 sig; /* CPUID */
|
||||
u32 rev; /* Update Revision */
|
||||
u32 date; /* Date */
|
||||
u32 sig; /* Processor Signature */
|
||||
|
||||
u32 cksum; /* Checksum */
|
||||
u32 ldrver; /* Loader Version */
|
||||
u32 pf; /* Platform ID */
|
||||
u32 cksum; /* Checksum */
|
||||
u32 ldrver; /* Loader Revision */
|
||||
u32 pf; /* Processor Flags */
|
||||
|
||||
u32 data_size; /* Data size */
|
||||
u32 total_size; /* Total size */
|
||||
u32 data_size; /* Data Size */
|
||||
u32 total_size; /* Total Size */
|
||||
|
||||
u32 reserved[3];
|
||||
u32 bits[1012];
|
||||
};
|
||||
|
||||
static inline u32 read_microcode_rev(void)
|
||||
{
|
||||
/* Some Intel Cpus can be very finicky about the
|
||||
/* Some Intel CPUs can be very finicky about the
|
||||
* CPUID sequence used. So this is implemented in
|
||||
* assembly so that it works reliably.
|
||||
*/
|
||||
msr_t msr;
|
||||
__asm__ volatile (
|
||||
"wrmsr\n\t"
|
||||
asm volatile (
|
||||
"xorl %%eax, %%eax\n\t"
|
||||
"xorl %%edx, %%edx\n\t"
|
||||
"movl $0x8b, %%ecx\n\t"
|
||||
|
@ -52,14 +68,14 @@ static inline u32 read_microcode_rev(void)
|
|||
|
||||
void intel_update_microcode(const void *microcode_updates)
|
||||
{
|
||||
unsigned int eax;
|
||||
unsigned int pf, rev, sig;
|
||||
u32 eax;
|
||||
u32 pf, rev, sig;
|
||||
unsigned int x86_model, x86_family;
|
||||
const struct microcode *m;
|
||||
const char *c;
|
||||
msr_t msr;
|
||||
|
||||
/* cpuid sets msr 0x8B iff a microcode update has been loaded. */
|
||||
/* CPUID sets MSR 0x8B iff a microcode update has been loaded. */
|
||||
msr.lo = 0;
|
||||
msr.hi = 0;
|
||||
wrmsr(0x8B, msr);
|
||||
|
@ -75,35 +91,38 @@ void intel_update_microcode(const void *microcode_updates)
|
|||
msr = rdmsr(0x17);
|
||||
pf = 1 << ((msr.hi >> 18) & 7);
|
||||
}
|
||||
print_debug("microcode_info: sig = 0x");
|
||||
print_debug_hex32(sig);
|
||||
print_debug(" pf=0x");
|
||||
print_debug_hex32(pf);
|
||||
print_debug(" rev = 0x");
|
||||
print_debug_hex32(rev);
|
||||
print_debug("\n");
|
||||
#if !defined(__ROMCC__)
|
||||
/* If this code is compiled with ROMCC we're probably in
|
||||
* the bootblock and don't have console output yet.
|
||||
*/
|
||||
printk(BIOS_DEBUG, "microcode_info: sig=0x%08x pf=0x%08x rev=0x%08x\n",
|
||||
sig, pf, rev);
|
||||
#endif
|
||||
|
||||
m = microcode_updates;
|
||||
for(c = microcode_updates; m->hdrver; m = (const struct microcode *)c) {
|
||||
for(c = microcode_updates; m->hdrver; m = (const struct microcode *)c) {
|
||||
if ((m->sig == sig) && (m->pf & pf)) {
|
||||
unsigned int new_rev;
|
||||
msr.lo = (unsigned long)(&m->bits) & 0xffffffff;
|
||||
msr.lo = (unsigned long)c + sizeof(struct microcode);
|
||||
msr.hi = 0;
|
||||
wrmsr(0x79, msr);
|
||||
|
||||
/* Read back the new microcode version */
|
||||
new_rev = read_microcode_rev();
|
||||
|
||||
print_debug("microcode updated to revision: ");
|
||||
print_debug_hex32(new_rev);
|
||||
print_debug(" from revision ");
|
||||
print_debug_hex32(rev);
|
||||
print_debug("\n");
|
||||
#if !defined(__ROMCC__)
|
||||
printk(BIOS_DEBUG, "microcode updated to revision: "
|
||||
"%08x from revision %08x\n", new_rev, rev);
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
|
||||
if (m->total_size) {
|
||||
c += m->total_size;
|
||||
} else {
|
||||
#if !defined(__ROMCC__)
|
||||
printk(BIOS_WARNING, "Microcode has no valid size field!\n");
|
||||
#endif
|
||||
c += 2048;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -27,94 +27,7 @@ static const uint32_t microcode_updates[] = {
|
|||
#include "x06_microcode.h"
|
||||
};
|
||||
|
||||
struct microcode {
|
||||
u32 hdrver; /* Header Version */
|
||||
u32 rev; /* Patch ID */
|
||||
u32 date; /* DATE */
|
||||
u32 sig; /* CPUID */
|
||||
|
||||
u32 cksum; /* Checksum */
|
||||
u32 ldrver; /* Loader Version */
|
||||
u32 pf; /* Platform ID */
|
||||
|
||||
u32 data_size; /* Data size */
|
||||
u32 total_size; /* Total size */
|
||||
|
||||
u32 reserved[3];
|
||||
u32 bits[1012];
|
||||
};
|
||||
|
||||
static inline u32 read_microcode_rev(void)
|
||||
{
|
||||
/* Some Intel Cpus can be very finicky about the
|
||||
* CPUID sequence used. So this is implemented in
|
||||
* assembly so that it works reliably.
|
||||
*/
|
||||
msr_t msr;
|
||||
__asm__ volatile (
|
||||
"wrmsr\n\t"
|
||||
"xorl %%eax, %%eax\n\t"
|
||||
"xorl %%edx, %%edx\n\t"
|
||||
"movl $0x8b, %%ecx\n\t"
|
||||
"wrmsr\n\t"
|
||||
"movl $0x01, %%eax\n\t"
|
||||
"cpuid\n\t"
|
||||
"movl $0x08b, %%ecx\n\t"
|
||||
"rdmsr \n\t"
|
||||
: /* outputs */
|
||||
"=a" (msr.lo), "=d" (msr.hi)
|
||||
: /* inputs */
|
||||
: /* trashed */
|
||||
"ecx"
|
||||
);
|
||||
return msr.hi;
|
||||
}
|
||||
|
||||
void intel_update_microcode(const void *microcode_updates)
|
||||
{
|
||||
unsigned int eax;
|
||||
unsigned int pf, rev, sig;
|
||||
unsigned int x86_model, x86_family;
|
||||
const struct microcode *m;
|
||||
const char *c;
|
||||
msr_t msr;
|
||||
|
||||
/* cpuid sets msr 0x8B iff a microcode update has been loaded. */
|
||||
msr.lo = 0;
|
||||
msr.hi = 0;
|
||||
wrmsr(0x8B, msr);
|
||||
eax = cpuid_eax(1);
|
||||
msr = rdmsr(0x8B);
|
||||
rev = msr.hi;
|
||||
x86_model = (eax >>4) & 0x0f;
|
||||
x86_family = (eax >>8) & 0x0f;
|
||||
sig = eax;
|
||||
|
||||
pf = 0;
|
||||
if ((x86_model >= 5)||(x86_family>6)) {
|
||||
msr = rdmsr(0x17);
|
||||
pf = 1 << ((msr.hi >> 18) & 7);
|
||||
}
|
||||
|
||||
m = microcode_updates;
|
||||
for(c = microcode_updates; m->hdrver; m = (const struct microcode *)c) {
|
||||
if ((m->sig == sig) && (m->pf & pf)) {
|
||||
unsigned int new_rev;
|
||||
msr.lo = (unsigned long)(&m->bits) & 0xffffffff;
|
||||
msr.hi = 0;
|
||||
wrmsr(0x79, msr);
|
||||
|
||||
/* Read back the new microcode version */
|
||||
new_rev = read_microcode_rev();
|
||||
break;
|
||||
}
|
||||
if (m->total_size) {
|
||||
c += m->total_size;
|
||||
} else {
|
||||
c += 2048;
|
||||
}
|
||||
}
|
||||
}
|
||||
#include <cpu/intel/microcode/microcode.c>
|
||||
|
||||
static void set_var_mtrr(
|
||||
unsigned reg, unsigned base, unsigned size, unsigned type)
|
||||
|
|
|
@ -1 +1,22 @@
|
|||
/*
|
||||
* This file is part of the coreboot project.
|
||||
*
|
||||
* Copyright (C) 2000 Ronald G. Minnich
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#if !defined(__ROMCC__)
|
||||
void intel_update_microcode(const void *microcode_updates);
|
||||
#endif
|
||||
|
|
Loading…
Reference in New Issue