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-rw-r--r--src/arch/i386/boot/acpi.c109
-rw-r--r--src/arch/i386/boot/wakeup.S126
-rw-r--r--src/arch/i386/include/arch/acpi.h47
-rw-r--r--src/arch/i386/lib/c_start.S23
4 files changed, 199 insertions, 106 deletions
diff --git a/src/arch/i386/boot/acpi.c b/src/arch/i386/boot/acpi.c
index 928a49fe53..beef891424 100644
--- a/src/arch/i386/boot/acpi.c
+++ b/src/arch/i386/boot/acpi.c
@@ -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);
-
- 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;
- }
+ /* 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)
+ 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
diff --git a/src/arch/i386/boot/wakeup.S b/src/arch/i386/boot/wakeup.S
index 7915fc38c5..b348e95a71 100644
--- a/src/arch/i386/boot/wakeup.S
+++ b/src/arch/i386/boot/wakeup.S
@@ -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 */
- .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 */
-
- .data
-
- /* 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
+ /* This is a FAR JMP to the OS waking vector. The C code changed
+ * the address to be correct.
+ */
+ .byte 0xea
- /* 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 */
+__wakeup_offset = RELOCATED(.)
+ .word 0x0000
- /* selgdt 0x10, flat code segment 16bit */
- .word 0xffff, 0x0000
- .byte 0x00, 0x9b, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */
+__wakeup_segment = RELOCATED(.)
+ .word 0x0000
-gdt_wakeup_end:
+ .globl __wakeup_size
+__wakeup_size = ( . - __wakeup)
- .previous
-.code32
diff --git a/src/arch/i386/include/arch/acpi.h b/src/arch/i386/include/arch/acpi.h
index 85b8445b2f..21ec64e96e 100644
--- a/src/arch/i386/include/arch/acpi.h
+++ b/src/arch/i386/include/arch/acpi.h
@@ -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);
diff --git a/src/arch/i386/lib/c_start.S b/src/arch/i386/lib/c_start.S
index d2d8b435bc..4ef59799a9 100644
--- a/src/arch/i386/lib/c_start.S
+++ b/src/arch/i386/lib/c_start.S
@@ -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:
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 13:01:21 +0000