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* Simplify acpi_add_table 

* fix some comments
* Simplify ACPI wakeup code and make it work without a memory hole
* Add resume entries to global GDT so we don't need our own for resume.
* add ECDT description to acpi.h for anyone who might need it  ;-) 
* remove rather stupid math to get the right number of MAX_ACPI_TABLES
  and just define a reasonable maximum for now.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Rudolf Marek <r.marek@assembler.cz>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4932 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer 2009-11-10 22:17:15 +00:00 committed by Stefan Reinauer
parent a0141f050b
commit c0ac7e9046
4 changed files with 198 additions and 105 deletions
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107
src/arch/i386/boot/acpi.c
View File

@ -18,7 +18,8 @@
* write_acpi_tables()
* acpi_dump_apics()
*
* See AMD Solo, Island Aruma or Via Epia-M port for more details.
* See Kontron 986LCD-M port for a good example of an ACPI implementation
* in coreboot.
*/
#include <console/console.h>
@ -26,6 +27,7 @@
#include <arch/acpi.h>
#include <arch/acpigen.h>
#include <device/pci.h>
#include <cbmem.h>
u8 acpi_checksum(u8 *table, u32 length)
{
@ -37,54 +39,67 @@ u8 acpi_checksum(u8 *table, u32 length)
return -ret;
}
/*
* add an acpi table to rsdt structure, and recalculate checksum
/**
* Add an ACPI table to the RSDT (and XSDT) structure, recalculate length and checksum
*/
void acpi_add_table(acpi_rsdp_t *rsdp, void *table)
{
int i;
int i, entries_num;
acpi_rsdt_t *rsdt;
acpi_xsdt_t *xsdt = NULL;
/* The RSDT is mandatory ... */
rsdt = (acpi_rsdt_t *)rsdp->rsdt_address;
/* ... while the XSDT is not */
if (rsdp->xsdt_address) {
xsdt = (acpi_xsdt_t *)((u32)rsdp->xsdt_address);
}
int entries_num = ARRAY_SIZE(rsdt->entry);
/* This should always be MAX_ACPI_TABLES */
entries_num = ARRAY_SIZE(rsdt->entry);
for (i=0; i<entries_num; i++) {
if(rsdt->entry[i]==0) {
rsdt->entry[i]=(u32)table;
/* fix length to stop kernel whining about invalid entries */
rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i+1));
/* fix checksum */
/* hope this won't get optimized away */
rsdt->header.checksum=0;
rsdt->header.checksum=acpi_checksum((u8 *)rsdt,
rsdt->header.length);
/* And now the same thing for the XSDT. We use the same
* index as we want the XSDT and RSDT to always be in
* sync in coreboot.
*/
if (xsdt) {
xsdt->entry[i]=(u64)(u32)table;
xsdt->header.length = sizeof(acpi_header_t) +
(sizeof(u64) * (i+1));
xsdt->header.checksum=0;
xsdt->header.checksum=acpi_checksum((u8 *)xsdt,
xsdt->header.length);
}
printk_debug("ACPI: added table %d/%d Length now %d\n",
i+1, entries_num, rsdt->header.length);
return;
}
for (i = 0; i < entries_num; i++) {
if(rsdt->entry[i] == 0)
break;
}
printk_err("ACPI: Error: Could not add ACPI table, too many tables.\n");
if (i >= entries_num) {
printk_err("ACPI: Error: Could not add ACPI table, too many tables.\n");
return;
}
/* Add table to the RSDT */
rsdt->entry[i] = (u32)table;
/* Fix RSDT length or the kernel will assume invalid entries */
rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i+1));
/* Re-calculate checksum */
rsdt->header.checksum = 0; /* Hope this won't get optimized away */
rsdt->header.checksum = acpi_checksum((u8 *)rsdt,
rsdt->header.length);
/* And now the same thing for the XSDT. We use the same index as for
* now we want the XSDT and RSDT to always be in sync in coreboot.
*/
if (xsdt) {
/* Add table to the XSDT */
xsdt->entry[i]=(u64)(u32)table;
/* Fix XSDT length */
xsdt->header.length = sizeof(acpi_header_t) +
(sizeof(u64) * (i+1));
/* Re-calculate checksum */
xsdt->header.checksum=0;
xsdt->header.checksum=acpi_checksum((u8 *)xsdt,
xsdt->header.length);
}
printk_debug("ACPI: added table %d/%d Length now %d\n",
i+1, entries_num, rsdt->header.length);
}
int acpi_create_mcfg_mmconfig(acpi_mcfg_mmconfig_t *mmconfig, u32 base, u16 seg_nr, u8 start, u8 end)
@ -222,7 +237,8 @@ void acpi_create_mcfg(acpi_mcfg_t *mcfg)
}
/* this can be overriden by platform ACPI setup code,
if it calls acpi_create_ssdt_generator */
* if it calls acpi_create_ssdt_generator
*/
unsigned long __attribute__((weak)) acpi_fill_ssdt_generator(unsigned long current,
const char *oem_table_id) {
return current;
@ -560,10 +576,29 @@ extern char *lowmem_backup;
extern char *lowmem_backup_ptr;
extern int lowmem_backup_size;
#define WAKEUP_BASE 0x600
void (*acpi_do_wakeup)(u32 vector, u32 backup_source, u32 backup_target, u32
backup_size) __attribute__((regparm(0))) = (void *)WAKEUP_BASE;
extern unsigned char __wakeup, __wakeup_size;
void acpi_jump_to_wakeup(void *vector)
{
u32 acpi_backup_memory = (u32) cbmem_find(CBMEM_ID_RESUME);
if (!acpi_backup_memory) {
printk(BIOS_WARNING, "ACPI: Backup memory missing. No S3 Resume.\n");
return;
}
// FIXME this should go into the ACPI backup memory, too. No pork saussages.
/* just restore the SMP trampoline and continue with wakeup on assembly level */
memcpy(lowmem_backup_ptr, lowmem_backup, lowmem_backup_size);
acpi_jmp_to_realm_wakeup((u32) vector);
/* copy wakeup trampoline in place */
memcpy(WAKEUP_BASE, &__wakeup, &__wakeup_size);
acpi_do_wakeup((u32)vector, acpi_backup_memory, CONFIG_RAMBASE, HIGH_MEMORY_SAVE);
}
#endif

126
src/arch/i386/boot/wakeup.S
View File

@ -2,10 +2,11 @@
* This file is part of the coreboot project.
*
* Copyright (C) 2009 Rudolf Marek <r.marek@assembler.cz>
* Copyright (C) 2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
* 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
@ -16,76 +17,89 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
.text
.code32
.globl acpi_jmp_to_realm_wakeup
/* This function does the PM -> RM switch, but
it can run >1MB even in real mode */
acpi_jmp_to_realm_wakeup:
mov 0x4(%esp), %eax
#define WAKEUP_BASE 0x600
#define RELOCATED(x) (x - __wakeup + WAKEUP_BASE)
/* CR0 bits */
#define PE (1 << 0)
.code32
.globl __wakeup
__wakeup:
/* First prepare the jmp to the resume vector */
mov 0x4(%esp), %eax /* vector */
/* last 4 bits of linear addr are taken as offset */
andw $0x0f, %ax
movw %ax, (jmp_off)
movw %ax, (__wakeup_offset)
mov 0x4(%esp), %eax
/* the rest is taken as segment */
shr $4, %eax
movw %ax, (jmp_seg)
lgdt gdtaddr_wakeup
movl $0x008,%eax
mov %eax,%ds
movl %eax,%es
movl %eax,%ss
movl %eax,%fs
movl %eax,%gs
ljmp $0x0010,$reload_cs
.code16gcc
reload_cs:
/* switch off PE */
movw %ax, (__wakeup_segment)
/* Then overwrite coreboot with our backed up memory */
movl 8(%esp), %esi
movl 12(%esp), %edi
movl 16(%esp), %ecx
shrl $4, %ecx
1:
movl 0(%esi),%eax
movl 4(%esi),%edx
movl 8(%esi),%ebx
movl 12(%esi),%ebp
addl $16,%esi
subl $1,%ecx
movl %eax,0(%edi)
movl %edx,4(%edi)
movl %ebx,8(%edi)
movl %ebp,12(%edi)
leal 16(%edi),%edi
jne 1b
/* Activate the right segment descriptor real mode. */
ljmp $0x28, $RELOCATED(1f)
1:
.code16
/* 16 bit code from here on... */
/* Load the segment registers w/ properly configured
* segment descriptors. They will retain these
* configurations (limits, writability, etc.) once
* protected mode is turned off.
*/
mov $0x30, %ax
mov %ax, %ds
mov %ax, %es
mov %ax, %fs
mov %ax, %gs
mov %ax, %ss
/* Turn off protection */
movl %cr0, %eax
andb $0xfe,%al
andl $~PE, %eax
movl %eax, %cr0
ljmpl $0x0, $cpu_flushed
cpu_flushed:
/* Now really going into real mode */
ljmp $0, $RELOCATED(1f)
1:
movw $0x0, %ax
movw %ax, %ds
movw %ax, %es
movw %ax, %ss
movw %ax, %fs
movw %ax, %gs
/* far jump to OS waking vector. The linear addr is changed to SEG and OFFSET
check ACPI specs or above code for details */
/* This is a FAR JMP to the OS waking vector. The C code changed
* the address to be correct.
*/
.byte 0xea
jmp_off:
.word 0
jmp_seg:
.word 0
.code32
gdt_wakeup_limit = gdt_wakeup_end - gdt_wakeup - 1 /* compute the table limit */
gdtaddr_wakeup:
.word gdt_wakeup_limit /* the table limit */
.long gdt_wakeup /* we know the offset */
__wakeup_offset = RELOCATED(.)
.word 0x0000
.data
__wakeup_segment = RELOCATED(.)
.word 0x0000
/* This is the gdt for GCC part of coreboot.
* It is different from the gdt in ROMCC/ASM part of coreboot
* which is defined in entry32.inc */
gdt_wakeup:
/* selgdt 0, unused */
.word 0x0000, 0x0000 /* dummy */
.byte 0x00, 0x00, 0x00, 0x00
.globl __wakeup_size
__wakeup_size = ( . - __wakeup)
/* selgdt 8, flat data segment 16bit */
.word 0x0000, 0x0000 /* dummy */
.byte 0x00, 0x93, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */
/* selgdt 0x10, flat code segment 16bit */
.word 0xffff, 0x0000
.byte 0x00, 0x9b, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */
gdt_wakeup_end:
.previous
.code32

47
src/arch/i386/include/arch/acpi.h
View File

@ -1,16 +1,27 @@
/*
* coreboot ACPI Support - headers and defines.
*
*
* written by Stefan Reinauer <stepan@coresystems.de>
* Copyright (C) 2004 SUSE LINUX AG
* Copyright (C) 2004 Nick Barker
* Copyright (C) 2008-2009 coresystems GmbH
*
* The ACPI table structs are based on the Linux kernel sources.
* ACPI FADT & FACS added by Nick Barker <nick.barker9@btinternet.com>
* those parts (C) 2004 Nick Barker
* 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 __ASM_ACPI_H
#define __ASM_ACPI_H
@ -48,6 +59,12 @@ typedef struct acpi_gen_regaddr {
u32 addrh;
} __attribute__ ((packed)) acpi_addr_t;
#define ACPI_ADDRESS_SPACE_MEMORY 0
#define ACPI_ADDRESS_SPACE_IO 1
#define ACPI_ADDRESS_SPACE_PCI 2
#define ACPI_ADDRESS_SPACE_FIXED 0x7f
/* Generic ACPI Header, provided by (almost) all tables */
typedef struct acpi_table_header /* ACPI common table header */
@ -63,12 +80,8 @@ typedef struct acpi_table_header /* ACPI common table header */
u32 asl_compiler_revision; /* ASL compiler revision number */
} __attribute__ ((packed)) acpi_header_t;
/* FIXME: This is very fragile:
* MCONFIG, HPET, FADT, SRAT, SLIT, MADT(APIC), SSDT, SSDTX, and SSDT for CPU
* pstate
*/
#define MAX_ACPI_TABLES (7 + CONFIG_ACPI_SSDTX_NUM + CONFIG_MAX_CPUS)
/* A maximum number of 32 ACPI tables ought to be enough for now */
#define MAX_ACPI_TABLES 32
/* RSDT */
typedef struct acpi_rsdt {
@ -330,6 +343,16 @@ typedef struct acpi_facs {
//
#define ACPI_FACS_S4BIOS_F (1 << 0)
typedef struct acpi_ecdt {
struct acpi_table_header header;
struct acpi_gen_regaddr ec_control;
struct acpi_gen_regaddr ec_data;
u32 uid;
u8 gpe_bit;
u8 ec_id[];
} __attribute__ ((packed)) acpi_ecdt_t;
/* These are implemented by the target port */
unsigned long write_acpi_tables(unsigned long addr);
unsigned long acpi_fill_madt(unsigned long current);
@ -382,7 +405,7 @@ extern u8 acpi_slp_type;
void suspend_resume(void);
void *acpi_find_wakeup_vector(void);
void *acpi_get_wakeup_rsdp(void);
void acpi_jmp_to_realm_wakeup(u32 linear_addr);
void acpi_jmp_to_realm_wakeup(u32 linear_addr) __attribute__((regparm(0)));
void acpi_jump_to_wakeup(void *wakeup_addr);
int acpi_get_sleep_type(void);

23
src/arch/i386/lib/c_start.S
View File

@ -253,7 +253,16 @@ gdtaddr:
/* This is the gdt for GCC part of coreboot.
* It is different from the gdt in ROMCC/ASM part of coreboot
* which is defined in entry32.inc */ /* BUT WHY?? */
* which is defined in entry32.inc
*
* When the machine is initially started, we use a very simple
* gdt from rom (that in entry32.inc) which only contains those
* entries we need for protected mode.
*
* When we're executing code from RAM, we want to do more complex
* stuff, like initializing PCI option roms in real mode, or doing
* a resume from a suspend to ram.
*/
gdt:
/* selgdt 0, unused */
.word 0x0000, 0x0000 /* dummy */
@ -275,6 +284,8 @@ gdt:
.word 0x0000, 0x0000 /* dummy */
.byte 0x00, 0x00, 0x00, 0x00
/* The next two entries are used for executing VGA option ROMs */
/* selgdt 0x28 16-bit 64k code at 0x00000000 */
.word 0xffff, 0x0000
.byte 0, 0x9a, 0, 0
@ -282,6 +293,16 @@ gdt:
/* selgdt 0x30 16-bit 64k data at 0x00000000 */
.word 0xffff, 0x0000
.byte 0, 0x92, 0, 0
/* The next two entries are used for ACPI S3 RESUME */
/* selgdt 0x38, flat data segment 16bit */
.word 0x0000, 0x0000 /* dummy */
.byte 0x00, 0x93, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */
/* selgdt 0x40, flat code segment 16bit */
.word 0xffff, 0x0000
.byte 0x00, 0x9b, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */
gdt_end:
idtarg: