/*
+ * This file is part of the coreboot project.
+ *
* coreboot ACPI Table support
* written by Stefan Reinauer <stepan@openbios.org>
- * (C) 2004 SUSE LINUX AG
- * (C) 2005 Stefan Reinauer
*
- * ACPI FADT, FACS, and DSDT table support added by
+ * 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
*/
-/*
+/*
* Each system port implementing ACPI has to provide two functions:
- *
+ *
* 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)
{
- u8 ret=0;
+ u8 ret = 0;
while (length--) {
ret += *table;
table++;
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_rsdt_t *rsdt, void *table)
+void acpi_add_table(acpi_rsdp_t *rsdp, void *table)
{
- int i;
-
- 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 winging 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);
-
- printk_debug("ACPI: added table %d/%d Length now %d\n",i+1, entries_num, rsdt->header.length);
- return;
- }
+ 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);
+
+ /* 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;
+ }
+
+ /* 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_warning("ACPI: could not add ACPI table to RSDT. failed.\n");
+ 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)
+int acpi_create_mcfg_mmconfig(acpi_mcfg_mmconfig_t *mmconfig, u32 base,
+ u16 seg_nr, u8 start, u8 end)
{
mmconfig->base_address = base;
mmconfig->base_reserved = 0;
mmconfig->pci_segment_group_number = seg_nr;
mmconfig->start_bus_number = start;
mmconfig->end_bus_number = end;
- return (sizeof(acpi_mcfg_mmconfig_t));
-}
+ return sizeof(acpi_mcfg_mmconfig_t);
+}
int acpi_create_madt_lapic(acpi_madt_lapic_t *lapic, u8 cpu, u8 apic)
{
- lapic->type=0;
- lapic->length=sizeof(acpi_madt_lapic_t);
- lapic->flags=1;
-
- lapic->processor_id=cpu;
- lapic->apic_id=apic;
-
- return(lapic->length);
+ lapic->type = 0; /* Local APIC structure */
+ lapic->length = sizeof(acpi_madt_lapic_t);
+ lapic->flags = (1 << 0); /* Processor/LAPIC enabled */
+ lapic->processor_id = cpu;
+ lapic->apic_id = apic;
+
+ return lapic->length;
}
-int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,u32 gsi_base)
+unsigned long acpi_create_madt_lapics(unsigned long current)
{
- ioapic->type=1;
- ioapic->length=sizeof(acpi_madt_ioapic_t);
- ioapic->reserved=0x00;
- ioapic->gsi_base=gsi_base;
-
- ioapic->ioapic_id=id;
- ioapic->ioapic_addr=addr;
-
- return(ioapic->length);
+ device_t cpu;
+ int cpu_index = 0;
+
+ for (cpu = all_devices; cpu; cpu = cpu->next) {
+ if ((cpu->path.type != DEVICE_PATH_APIC) ||
+ (cpu->bus->dev->path.type != DEVICE_PATH_APIC_CLUSTER)) {
+ continue;
+ }
+ if (!cpu->enabled)
+ continue;
+ current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current,
+ cpu_index, cpu->path.apic.apic_id);
+ cpu_index++;
+ }
+
+ return current;
+}
+
+int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,
+ u32 gsi_base)
+{
+ ioapic->type = 1; /* I/O APIC structure */
+ ioapic->length = sizeof(acpi_madt_ioapic_t);
+ ioapic->reserved = 0x00;
+ ioapic->gsi_base = gsi_base;
+ ioapic->ioapic_id = id;
+ ioapic->ioapic_addr = addr;
+
+ return ioapic->length;
}
int acpi_create_madt_irqoverride(acpi_madt_irqoverride_t *irqoverride,
u8 bus, u8 source, u32 gsirq, u16 flags)
{
- irqoverride->type=2;
- irqoverride->length=sizeof(acpi_madt_irqoverride_t);
- irqoverride->bus=bus;
- irqoverride->source=source;
- irqoverride->gsirq=gsirq;
- irqoverride->flags=flags;
-
- return(irqoverride->length);
+ irqoverride->type = 2; /* Interrupt source override */
+ irqoverride->length = sizeof(acpi_madt_irqoverride_t);
+ irqoverride->bus = bus;
+ irqoverride->source = source;
+ irqoverride->gsirq = gsirq;
+ irqoverride->flags = flags;
+
+ return irqoverride->length;
}
int acpi_create_madt_lapic_nmi(acpi_madt_lapic_nmi_t *lapic_nmi, u8 cpu,
- u16 flags, u8 lint)
+ u16 flags, u8 lint)
{
- lapic_nmi->type=4;
- lapic_nmi->length=sizeof(acpi_madt_lapic_nmi_t);
-
- lapic_nmi->flags=flags;
- lapic_nmi->processor_id=cpu;
- lapic_nmi->lint=lint;
-
- return(lapic_nmi->length);
+ lapic_nmi->type = 4; /* Local APIC NMI structure */
+ lapic_nmi->length = sizeof(acpi_madt_lapic_nmi_t);
+ lapic_nmi->flags = flags;
+ lapic_nmi->processor_id = cpu;
+ lapic_nmi->lint = lint;
+
+ return lapic_nmi->length;
}
void acpi_create_madt(acpi_madt_t *madt)
{
#define LOCAL_APIC_ADDR 0xfee00000ULL
-
- acpi_header_t *header=&(madt->header);
- unsigned long current=(unsigned long)madt+sizeof(acpi_madt_t);
-
+
+ acpi_header_t *header = &(madt->header);
+ unsigned long current = (unsigned long)madt + sizeof(acpi_madt_t);
+
memset((void *)madt, 0, sizeof(acpi_madt_t));
-
- /* fill out header fields */
- memcpy(header->signature, MADT_NAME, 4);
+
+ /* Fill out header fields. */
+ memcpy(header->signature, "APIC", 4);
memcpy(header->oem_id, OEM_ID, 6);
- memcpy(header->oem_table_id, MADT_TABLE, 8);
+ memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
-
+
header->length = sizeof(acpi_madt_t);
- header->revision = 1;
+ header->revision = 1; /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
- madt->lapic_addr= LOCAL_APIC_ADDR;
- madt->flags = 0x1; /* PCAT_COMPAT */
+ madt->lapic_addr = LOCAL_APIC_ADDR;
+ madt->flags = 0x1; /* PCAT_COMPAT */
current = acpi_fill_madt(current);
-
- /* recalculate length */
- header->length= current - (unsigned long)madt;
-
- header->checksum = acpi_checksum((void *)madt, header->length);
+
+ /* (Re)calculate length and checksum. */
+ header->length = current - (unsigned long)madt;
+
+ header->checksum = acpi_checksum((void *)madt, header->length);
}
+/* MCFG is defined in the PCI Firmware Specification 3.0. */
void acpi_create_mcfg(acpi_mcfg_t *mcfg)
{
+ acpi_header_t *header = &(mcfg->header);
+ unsigned long current = (unsigned long)mcfg + sizeof(acpi_mcfg_t);
- acpi_header_t *header=&(mcfg->header);
- unsigned long current=(unsigned long)mcfg+sizeof(acpi_mcfg_t);
-
memset((void *)mcfg, 0, sizeof(acpi_mcfg_t));
-
- /* fill out header fields */
- memcpy(header->signature, MCFG_NAME, 4);
+
+ /* Fill out header fields. */
+ memcpy(header->signature, "MCFG", 4);
memcpy(header->oem_id, OEM_ID, 6);
- memcpy(header->oem_table_id, MCFG_TABLE, 8);
+ memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
-
+
header->length = sizeof(acpi_mcfg_t);
header->revision = 1;
current = acpi_fill_mcfg(current);
-
- /* recalculate length */
- header->length= current - (unsigned long)mcfg;
-
- header->checksum = acpi_checksum((void *)mcfg, header->length);
+
+ /* (Re)calculate length and checksum. */
+ header->length = current - (unsigned long)mcfg;
+ header->checksum = acpi_checksum((void *)mcfg, header->length);
}
-/* this can be overriden by platform ACPI setup code,
- if it calls acpi_create_ssdt_generator */
-unsigned long __attribute__((weak)) acpi_fill_ssdt_generator(unsigned long current,
- char *oem_table_id) {
+/*
+ * This can be overriden by platform ACPI setup code, 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;
}
-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);
+ unsigned long current = (unsigned long)ssdt + sizeof(acpi_header_t);
+
memset((void *)ssdt, 0, sizeof(acpi_header_t));
- memcpy(&ssdt->signature, SSDT_NAME, 4);
- ssdt->revision = 2;
+
+ memcpy(&ssdt->signature, "SSDT", 4);
+ ssdt->revision = 2; /* ACPI 1.0/2.0: ?, ACPI 3.0/4.0: 2 */
memcpy(&ssdt->oem_id, OEM_ID, 6);
memcpy(&ssdt->oem_table_id, oem_table_id, 8);
ssdt->oem_revision = 42;
- memcpy(&ssdt->asl_compiler_id, "GENAML", 4);
+ memcpy(&ssdt->asl_compiler_id, ASLC, 4);
ssdt->asl_compiler_revision = 42;
ssdt->length = sizeof(acpi_header_t);
acpigen_set_current((char *) current);
current = acpi_fill_ssdt_generator(current, oem_table_id);
- /* recalculate length */
+ /* (Re)calculate length and checksum. */
ssdt->length = current - (unsigned long)ssdt;
ssdt->checksum = acpi_checksum((void *)ssdt, ssdt->length);
}
int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic)
{
memset((void *)lapic, 0, sizeof(acpi_srat_lapic_t));
- lapic->type=0;
- lapic->length=sizeof(acpi_srat_lapic_t);
- lapic->flags=1;
- lapic->proximity_domain_7_0 = node;
- lapic->apic_id=apic;
+ lapic->type = 0; /* Processor local APIC/SAPIC affinity structure */
+ lapic->length = sizeof(acpi_srat_lapic_t);
+ lapic->flags = (1 << 0); /* Enabled (the use of this structure). */
+ lapic->proximity_domain_7_0 = node;
+ /* TODO: proximity_domain_31_8, local SAPIC EID, clock domain. */
+ lapic->apic_id = apic;
- return(lapic->length);
+ return lapic->length;
}
-int acpi_create_srat_mem(acpi_srat_mem_t *mem, u8 node, u32 basek,u32 sizek, u32 flags)
+int acpi_create_srat_mem(acpi_srat_mem_t *mem, u8 node, u32 basek, u32 sizek,
+ u32 flags)
{
- mem->type=1;
- mem->length=sizeof(acpi_srat_mem_t);
-
- mem->base_address_low = (basek<<10);
- mem->base_address_high = (basek>>(32-10));
-
- mem->length_low = (sizek<<10);
- mem->length_high = (sizek>>(32-10));
-
- mem->proximity_domain = node;
-
- mem->flags = flags;
-
- return(mem->length);
+ mem->type = 1; /* Memory affinity structure */
+ mem->length = sizeof(acpi_srat_mem_t);
+ mem->base_address_low = (basek << 10);
+ mem->base_address_high = (basek >> (32 - 10));
+ mem->length_low = (sizek << 10);
+ mem->length_high = (sizek >> (32 - 10));
+ mem->proximity_domain = node;
+ mem->flags = flags;
+
+ return mem->length;
}
+/* http://www.microsoft.com/whdc/system/sysinternals/sratdwn.mspx */
void acpi_create_srat(acpi_srat_t *srat)
{
+ acpi_header_t *header = &(srat->header);
+ unsigned long current = (unsigned long)srat + sizeof(acpi_srat_t);
- acpi_header_t *header=&(srat->header);
- unsigned long current=(unsigned long)srat+sizeof(acpi_srat_t);
-
- memset((void *)srat, 0, sizeof(acpi_srat_t));
-
- /* fill out header fields */
- memcpy(header->signature, SRAT_NAME, 4);
- memcpy(header->oem_id, OEM_ID, 6);
- memcpy(header->oem_table_id, SRAT_TABLE, 8);
- memcpy(header->asl_compiler_id, ASLC, 4);
+ memset((void *)srat, 0, sizeof(acpi_srat_t));
- header->length = sizeof(acpi_srat_t);
- header->revision = 1;
+ /* Fill out header fields. */
+ memcpy(header->signature, "SRAT", 4);
+ memcpy(header->oem_id, OEM_ID, 6);
+ memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+ memcpy(header->asl_compiler_id, ASLC, 4);
- srat->resv = 0x1; /* BACK COMP */
+ header->length = sizeof(acpi_srat_t);
+ header->revision = 1; /* ACPI 1.0: N/A, 2.0: 1, 3.0: 2, 4.0: 3 */
- current = acpi_fill_srat(current);
+ srat->resv = 1; /* Spec: Reserved to 1 for backwards compatibility. */
- /* recalculate length */
- header->length= current - (unsigned long)srat;
+ current = acpi_fill_srat(current);
- header->checksum = acpi_checksum((void *)srat, header->length);
+ /* (Re)calculate length and checksum. */
+ header->length = current - (unsigned long)srat;
+ header->checksum = acpi_checksum((void *)srat, header->length);
}
+/* http://h21007.www2.hp.com/portal/download/files/unprot/Itanium/slit.pdf */
void acpi_create_slit(acpi_slit_t *slit)
{
+ acpi_header_t *header = &(slit->header);
+ unsigned long current = (unsigned long)slit + sizeof(acpi_slit_t);
- acpi_header_t *header=&(slit->header);
- unsigned long current=(unsigned long)slit+sizeof(acpi_slit_t);
-
- memset((void *)slit, 0, sizeof(acpi_slit_t));
-
- /* fill out header fields */
- memcpy(header->signature, SLIT_NAME, 4);
- memcpy(header->oem_id, OEM_ID, 6);
- memcpy(header->oem_table_id, SLIT_TABLE, 8);
- memcpy(header->asl_compiler_id, ASLC, 4);
+ memset((void *)slit, 0, sizeof(acpi_slit_t));
- header->length = sizeof(acpi_slit_t);
- header->revision = 1;
+ /* Fill out header fields. */
+ memcpy(header->signature, "SLIT", 4);
+ memcpy(header->oem_id, OEM_ID, 6);
+ memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+ memcpy(header->asl_compiler_id, ASLC, 4);
- current = acpi_fill_slit(current);
+ header->length = sizeof(acpi_slit_t);
+ header->revision = 1; /* ACPI 1.0: N/A, ACPI 2.0/3.0/4.0: 1 */
- /* recalculate length */
- header->length= current - (unsigned long)slit;
+ current = acpi_fill_slit(current);
- header->checksum = acpi_checksum((void *)slit, header->length);
+ /* (Re)calculate length and checksum. */
+ header->length = current - (unsigned long)slit;
+ header->checksum = acpi_checksum((void *)slit, header->length);
}
+/* http://www.intel.com/hardwaredesign/hpetspec_1.pdf */
void acpi_create_hpet(acpi_hpet_t *hpet)
{
-#define HPET_ADDR 0xfed00000ULL
- acpi_header_t *header=&(hpet->header);
- acpi_addr_t *addr=&(hpet->addr);
-
+#define HPET_ADDR 0xfed00000ULL
+ acpi_header_t *header = &(hpet->header);
+ acpi_addr_t *addr = &(hpet->addr);
+
memset((void *)hpet, 0, sizeof(acpi_hpet_t));
-
- /* fill out header fields */
- memcpy(header->signature, HPET_NAME, 4);
+
+ /* Fill out header fields. */
+ memcpy(header->signature, "HPET", 4);
memcpy(header->oem_id, OEM_ID, 6);
- memcpy(header->oem_table_id, HPET_TABLE, 8);
+ memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
-
+
header->length = sizeof(acpi_hpet_t);
- header->revision = 1;
+ header->revision = 1; /* Currently 1. Table added in ACPI 2.0. */
+
+ /* Fill out HPET address. */
+ addr->space_id = 0; /* Memory */
+ addr->bit_width = 64;
+ addr->bit_offset = 0;
+ addr->addrl = HPET_ADDR & 0xffffffff;
+ addr->addrh = HPET_ADDR >> 32;
+
+ hpet->id = 0x102282a0; /* AMD! FIXME */
+ hpet->number = 0;
+ hpet->min_tick = 4096;
- /* fill out HPET address */
- addr->space_id = 0; /* Memory */
- addr->bit_width = 64;
- addr->bit_offset = 0;
- addr->addrl = HPET_ADDR & 0xffffffff;
- addr->addrh = HPET_ADDR >> 32;
-
- hpet->id = 0x102282a0; /* AMD ? */
- hpet->number = 0;
- hpet->min_tick = 4096;
-
- header->checksum = acpi_checksum((void *)hpet, sizeof(acpi_hpet_t));
+ header->checksum = acpi_checksum((void *)hpet, sizeof(acpi_hpet_t));
}
void acpi_create_facs(acpi_facs_t *facs)
{
- memset( (void *)facs,0, sizeof(acpi_facs_t));
+ memset((void *)facs, 0, sizeof(acpi_facs_t));
- memcpy(facs->signature,"FACS",4);
+ memcpy(facs->signature, "FACS", 4);
facs->length = sizeof(acpi_facs_t);
facs->hardware_signature = 0;
facs->firmware_waking_vector = 0;
facs->flags = 0;
facs->x_firmware_waking_vector_l = 0;
facs->x_firmware_waking_vector_h = 0;
- facs->version = 1;
+ facs->version = 1; /* ACPI 1.0: 0, ACPI 2.0/3.0: 1, ACPI 4.0: 2 */
}
void acpi_write_rsdt(acpi_rsdt_t *rsdt)
-{
- acpi_header_t *header=&(rsdt->header);
-
- /* fill out header fields */
- memcpy(header->signature, RSDT_NAME, 4);
+{
+ acpi_header_t *header = &(rsdt->header);
+
+ /* Fill out header fields. */
+ memcpy(header->signature, "RSDT", 4);
memcpy(header->oem_id, OEM_ID, 6);
- memcpy(header->oem_table_id, RSDT_TABLE, 8);
+ memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
-
+
header->length = sizeof(acpi_rsdt_t);
- header->revision = 1;
-
- /* fill out entries */
-
- // entries are filled in later, we come with an empty set.
-
- /* fix checksum */
-
- header->checksum = acpi_checksum((void *)rsdt, sizeof(acpi_rsdt_t));
+ header->revision = 1; /* ACPI 1.0/2.0/3.0/4.0: 1 */
+
+ /* Entries are filled in later, we come with an empty set. */
+
+ /* Fix checksum. */
+ header->checksum = acpi_checksum((void *)rsdt, sizeof(acpi_rsdt_t));
}
-void acpi_write_rsdp(acpi_rsdp_t *rsdp, acpi_rsdt_t *rsdt)
+void acpi_write_xsdt(acpi_xsdt_t *xsdt)
{
+ acpi_header_t *header = &(xsdt->header);
+
+ /* Fill out header fields. */
+ memcpy(header->signature, "XSDT", 4);
+ memcpy(header->oem_id, OEM_ID, 6);
+ memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+ memcpy(header->asl_compiler_id, ASLC, 4);
+
+ header->length = sizeof(acpi_xsdt_t);
+ header->revision = 1; /* ACPI 1.0: N/A, 2.0/3.0/4.0: 1 */
+
+ /* Entries are filled in later, we come with an empty set. */
+
+ /* Fix checksum. */
+ header->checksum = acpi_checksum((void *)xsdt, sizeof(acpi_xsdt_t));
+}
+
+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);
- rsdp->rsdt_address = (u32)rsdt;
- rsdp->checksum = acpi_checksum((void *)rsdp, 20);
- rsdp->ext_checksum = acpi_checksum((void *)rsdp, sizeof(acpi_rsdp_t));
+
+ rsdp->length = sizeof(acpi_rsdp_t);
+ rsdp->rsdt_address = (u32)rsdt;
+
+ /*
+ * Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2.
+ *
+ * Some OSes expect an XSDT to be present for RSD PTR revisions >= 2.
+ * If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR
+ * revision 0).
+ */
+ if (xsdt == NULL) {
+ rsdp->revision = 0;
+ } else {
+ rsdp->xsdt_address = (u64)(u32)xsdt;
+ rsdp->revision = 2;
+ }
+
+ /* Calculate checksums. */
+ rsdp->checksum = acpi_checksum((void *)rsdp, 20);
+ rsdp->ext_checksum = acpi_checksum((void *)rsdp, sizeof(acpi_rsdp_t));
+}
+
+#if CONFIG_HAVE_ACPI_RESUME == 1
+void suspend_resume(void)
+{
+ void *wake_vec;
+
+#if 0
+#if CONFIG_MEM_TRAIN_SEQ != 0
+ #error "So far it works on AMD and CONFIG_MEM_TRAIN_SEQ == 0"
+#endif
+
+#if CONFIG_RAMBASE < 0x1F00000
+ #error "For ACPI RESUME you need to have CONFIG_RAMBASE at least 31MB"
+ #error "Chipset support (S3_NVRAM_EARLY and ACPI_IS_WAKEUP_EARLY functions and memory ctrl)"
+ #error "And coreboot memory reserved in mainboard.c"
+#endif
+#endif
+ /* If we happen to be resuming find wakeup vector and jump to OS. */
+ wake_vec = acpi_find_wakeup_vector();
+ if (wake_vec)
+ acpi_jump_to_wakeup(wake_vec);
}
+/* This is to be filled by SB code - startup value what was found. */
+u8 acpi_slp_type = 0;
+static int acpi_is_wakeup(void)
+{
+ return (acpi_slp_type == 3);
+}
+
+static acpi_rsdp_t *valid_rsdp(acpi_rsdp_t *rsdp)
+{
+ if (strncmp((char *)rsdp, RSDP_SIG, sizeof(RSDP_SIG) - 1) != 0)
+ return NULL;
+
+ printk(BIOS_DEBUG, "Looking on %p for valid checksum\n", rsdp);
+
+ if (acpi_checksum((void *)rsdp, 20) != 0)
+ return NULL;
+ printk(BIOS_DEBUG, "Checksum 1 passed\n");
+
+ if ((rsdp->revision > 1) && (acpi_checksum((void *)rsdp,
+ rsdp->length) != 0))
+ return NULL;
+ printk(BIOS_DEBUG, "Checksum 2 passed all OK\n");
+
+ return rsdp;
+}
+
+static acpi_rsdp_t *rsdp;
+
+void *acpi_get_wakeup_rsdp(void)
+{
+ return rsdp;
+}
+
+void *acpi_find_wakeup_vector(void)
+{
+ char *p, *end;
+ acpi_rsdt_t *rsdt;
+ acpi_facs_t *facs;
+ acpi_fadt_t *fadt;
+ void *wake_vec;
+ int i;
+
+ rsdp = NULL;
+
+ if (!acpi_is_wakeup())
+ return NULL;
+
+ printk(BIOS_DEBUG, "Trying to find the wakeup vector...\n");
+
+ /* Find RSDP. */
+ for (p = (char *)0xe0000; p < (char *)0xfffff; p += 16) {
+ if ((rsdp = valid_rsdp((acpi_rsdp_t *)p)))
+ break;
+ }
+
+ if (rsdp == NULL)
+ return NULL;
+
+ printk(BIOS_DEBUG, "RSDP found at %p\n", rsdp);
+ rsdt = (acpi_rsdt_t *) rsdp->rsdt_address;
+
+ end = (char *)rsdt + rsdt->header.length;
+ 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 (strncmp((char *)fadt, "FACP", 4) == 0)
+ break;
+ fadt = NULL;
+ }
+
+ if (fadt == NULL)
+ return NULL;
+
+ printk(BIOS_DEBUG, "FADT found at %p\n", fadt);
+ facs = (acpi_facs_t *)fadt->firmware_ctrl;
+
+ if (facs == NULL) {
+ printk(BIOS_DEBUG, "No FACS found, wake up from S3 not "
+ "possible.\n");
+ return NULL;
+ }
+
+ printk(BIOS_DEBUG, "FACS found at %p\n", facs);
+ wake_vec = (void *)facs->firmware_waking_vector;
+ printk(BIOS_DEBUG, "OS waking vector is %p\n", wake_vec);
+
+ return wake_vec;
+}
+
+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);
+
+ /* 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