/*
+ * This file is part of the coreboot project.
+ *
* coreboot ACPI Table support
* written by Stefan Reinauer <stepan@openbios.org>
- * Copyright (C) 2004 SUSE LINUX AG
- * Copyright (C) 2005-2009 coresystems GmbH
+ *
+ * Copyright (C) 2004 SUSE LINUX AG
+ * Copyright (C) 2005-2009 coresystems GmbH
*
* ACPI FADT, FACS, and DSDT table support added by
* Nick Barker <nick.barker9@btinternet.com>, and those portions
- * (C) Copyright 2004 Nick Barker
+ * Copyright (C) 2004 Nick Barker
*
- * Copyright 2005 ADVANCED MICRO DEVICES, INC. All Rights Reserved.
+ * Copyright (C) 2005 ADVANCED MICRO DEVICES, INC. All Rights Reserved.
* 2005.9 yhlu add SRAT table generation
*/
* 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>
#include <arch/acpi.h>
#include <arch/acpigen.h>
#include <device/pci.h>
+#include <cbmem.h>
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;
+ }
+
+ if (i >= entries_num) {
+ printk(BIOS_ERR, "ACPI: Error: Could not add ACPI table, too many tables.\n");
+ return;
}
- printk_err("ACPI: Error: Could not add ACPI table, too many tables.\n");
+ /* 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(BIOS_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)
}
/* 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,
- char *oem_table_id) {
+ const char *oem_table_id) {
return current;
}
-void acpi_create_ssdt_generator(acpi_header_t *ssdt, char *oem_table_id)
+void acpi_create_ssdt_generator(acpi_header_t *ssdt, const char *oem_table_id)
{
unsigned long current=(unsigned long)ssdt+sizeof(acpi_header_t);
memset((void *)ssdt, 0, sizeof(acpi_header_t));
memset((void *)hpet, 0, sizeof(acpi_hpet_t));
/* fill out header fields */
- memcpy(header->signature, HPET_NAME, 4);
+ memcpy(header->signature, "HPET", 4);
memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
void acpi_write_rsdp(acpi_rsdp_t *rsdp, acpi_rsdt_t *rsdt, acpi_xsdt_t *xsdt)
{
+ memset(rsdp, 0, sizeof(acpi_rsdp_t));
memcpy(rsdp->signature, RSDP_SIG, 8);
memcpy(rsdp->oem_id, OEM_ID, 6);
rsdp->length = sizeof(acpi_rsdp_t);
/* this is to be filled by SB code - startup value what was found */
u8 acpi_slp_type = 0;
-int acpi_is_wakeup(void)
+static int acpi_is_wakeup(void)
{
return (acpi_slp_type == 3);
}
if (strncmp((char *)rsdp, RSDP_SIG, sizeof(RSDP_SIG) - 1) != 0)
return NULL;
- printk_debug("Looking on %p for valid checksum\n", rsdp);
+ printk(BIOS_DEBUG, "Looking on %p for valid checksum\n", rsdp);
if (acpi_checksum((void *)rsdp, 20) != 0)
return NULL;
- printk_debug("Checksum 1 passed\n");
+ printk(BIOS_DEBUG, "Checksum 1 passed\n");
if ((rsdp->revision > 1) && (acpi_checksum((void *)rsdp,
rsdp->length) != 0))
return NULL;
- printk_debug("Checksum 2 passed all OK\n");
+ printk(BIOS_DEBUG, "Checksum 2 passed all OK\n");
return rsdp;
}
if (!acpi_is_wakeup())
return NULL;
- printk_debug("Trying to find the wakeup vector ...\n");
+ printk(BIOS_DEBUG, "Trying to find the wakeup vector ...\n");
/* find RSDP */
for (p = (char *) 0xe0000; p < (char *) 0xfffff; p+=16) {
if (rsdp == NULL)
return NULL;
- printk_debug("RSDP found at %p\n", rsdp);
+ printk(BIOS_DEBUG, "RSDP found at %p\n", rsdp);
rsdt = (acpi_rsdt_t *) rsdp->rsdt_address;
end = (char *) rsdt + rsdt->header.length;
- printk_debug("RSDT found at %p ends at %p\n", rsdt, end);
+ printk(BIOS_DEBUG, "RSDT found at %p ends at %p\n", rsdt, end);
for (i = 0; ((char *) &rsdt->entry[i]) < end; i++) {
fadt = (acpi_fadt_t *) rsdt->entry[i];
if (fadt == NULL)
return NULL;
- printk_debug("FADT found at %p\n", fadt);
+ printk(BIOS_DEBUG, "FADT found at %p\n", fadt);
facs = (acpi_facs_t *)fadt->firmware_ctrl;
if (facs == NULL) {
- printk_debug("No FACS found, wake up from S3 not possible.\n");
+ printk(BIOS_DEBUG, "No FACS found, wake up from S3 not possible.\n");
return NULL;
}
- printk_debug("FACS found at %p\n", facs);
+ printk(BIOS_DEBUG, "FACS found at %p\n", facs);
wake_vec = (void *) facs->firmware_waking_vector;
- printk_debug("OS waking vector is %p\n", wake_vec);
+ printk(BIOS_DEBUG, "OS waking vector is %p\n", wake_vec);
return wake_vec;
}
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((void *)WAKEUP_BASE, &__wakeup, (size_t)&__wakeup_size);
+
+ acpi_do_wakeup((u32)vector, acpi_backup_memory, CONFIG_RAMBASE, HIGH_MEMORY_SAVE);
}
#endif
projects / coreboot.git / blobdiff