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Cosmetic fixes and comment additions in acpi.c.

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- Fix whitespace, coding style, and indentation in some places.

 - Add comments for less obvious entries and hardcoded numbers (e.g. 'type').

 - Add comments for all/most 'revision' fields, mention in which version
   of the ACPI spec which revision number is to be used.

 - Add URLs to a few external documents which describe tables that are
   not mentioned in the ACPI spec (or where the external document may
   provide further info), e.g. SRAT, SLIT, HPET, MCFG, etc.

 - Use the ASLC #define instead of hardcoding "CORE" in one instance
   (ASLC is already used everywhere else).

 - Add some TODOs for additional stuff which is in the spec but not yet
   handled by our code / #defines.

Abuild-tested.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6098 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Uwe Hermann 2010-11-19 15:14:42 +00:00
parent e882630d47
commit 622824cadb
1 changed files with 216 additions and 208 deletions
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222
src/arch/i386/boot/acpi.c
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@ -43,9 +43,9 @@ u8 acpi_checksum(u8 *table, u32 length)
} }
/** /**
* Add an ACPI table to the RSDT (and XSDT) structure, recalculate length and 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) void acpi_add_table(acpi_rsdp_t *rsdp, void *table)
{ {
int i, entries_num; int i, entries_num;
@ -55,12 +55,11 @@ void acpi_add_table(acpi_rsdp_t *rsdp, void *table)
/* The RSDT is mandatory... */ /* The RSDT is mandatory... */
rsdt = (acpi_rsdt_t *)rsdp->rsdt_address; rsdt = (acpi_rsdt_t *)rsdp->rsdt_address;
/* ... while the XSDT is not */ /* ...while the XSDT is not. */
if (rsdp->xsdt_address) { if (rsdp->xsdt_address)
xsdt = (acpi_xsdt_t *)((u32)rsdp->xsdt_address); xsdt = (acpi_xsdt_t *)((u32)rsdp->xsdt_address);
}
/* This should always be MAX_ACPI_TABLES */ /* This should always be MAX_ACPI_TABLES. */
entries_num = ARRAY_SIZE(rsdt->entry); entries_num = ARRAY_SIZE(rsdt->entry);
for (i = 0; i < entries_num; i++) { for (i = 0; i < entries_num; i++) {
@ -69,62 +68,64 @@ void acpi_add_table(acpi_rsdp_t *rsdp, void *table)
} }
if (i >= entries_num) { if (i >= entries_num) {
printk(BIOS_ERR, "ACPI: Error: Could not add ACPI table, too many tables.\n"); printk(BIOS_ERR, "ACPI: Error: Could not add ACPI table, "
"too many tables.\n");
return; return;
} }
/* Add table to the RSDT */ /* Add table to the RSDT. */
rsdt->entry[i] = (u32)table; rsdt->entry[i] = (u32)table;
/* Fix RSDT length or the kernel will assume invalid entries */ /* Fix RSDT length or the kernel will assume invalid entries. */
rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i + 1)); rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i + 1));
/* Re-calculate checksum */ /* Re-calculate checksum. */
rsdt->header.checksum = 0; /* Hope this won't get optimized away */ rsdt->header.checksum = 0; /* Hope this won't get optimized away */
rsdt->header.checksum = acpi_checksum((u8 *)rsdt, rsdt->header.checksum = acpi_checksum((u8 *)rsdt, rsdt->header.length);
rsdt->header.length);
/* And now the same thing for the XSDT. We use the same index as for /*
* 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. * now we want the XSDT and RSDT to always be in sync in coreboot.
*/ */
if (xsdt) { if (xsdt) {
/* Add table to the XSDT */ /* Add table to the XSDT. */
xsdt->entry[i] = (u64)(u32)table; xsdt->entry[i] = (u64)(u32)table;
/* Fix XSDT length */ /* Fix XSDT length. */
xsdt->header.length = sizeof(acpi_header_t) + xsdt->header.length = sizeof(acpi_header_t) +
(sizeof(u64) * (i + 1)); (sizeof(u64) * (i + 1));
/* Re-calculate checksum */ /* Re-calculate checksum. */
xsdt->header.checksum = 0; xsdt->header.checksum = 0;
xsdt->header.checksum = acpi_checksum((u8 *)xsdt, xsdt->header.checksum = acpi_checksum((u8 *)xsdt,
xsdt->header.length); xsdt->header.length);
} }
printk(BIOS_DEBUG, "ACPI: added table %d/%d Length now %d\n", printk(BIOS_DEBUG, "ACPI: added table %d/%d, length now %d\n",
i + 1, entries_num, rsdt->header.length); 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_address = base;
mmconfig->base_reserved = 0; mmconfig->base_reserved = 0;
mmconfig->pci_segment_group_number = seg_nr; mmconfig->pci_segment_group_number = seg_nr;
mmconfig->start_bus_number = start; mmconfig->start_bus_number = start;
mmconfig->end_bus_number = end; 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) int acpi_create_madt_lapic(acpi_madt_lapic_t *lapic, u8 cpu, u8 apic)
{ {
lapic->type=0; lapic->type = 0; /* Local APIC structure */
lapic->length = sizeof(acpi_madt_lapic_t); lapic->length = sizeof(acpi_madt_lapic_t);
lapic->flags=1; lapic->flags = (1 << 0); /* Processor/LAPIC enabled */
lapic->processor_id = cpu; lapic->processor_id = cpu;
lapic->apic_id = apic; lapic->apic_id = apic;
return(lapic->length); return lapic->length;
} }
unsigned long acpi_create_madt_lapics(unsigned long current) unsigned long acpi_create_madt_lapics(unsigned long current)
@ -137,52 +138,52 @@ unsigned long acpi_create_madt_lapics(unsigned long current)
(cpu->bus->dev->path.type != DEVICE_PATH_APIC_CLUSTER)) { (cpu->bus->dev->path.type != DEVICE_PATH_APIC_CLUSTER)) {
continue; continue;
} }
if (!cpu->enabled) { if (!cpu->enabled)
continue; continue;
} current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current,
current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, cpu_index, cpu->path.apic.apic_id); cpu_index, cpu->path.apic.apic_id);
cpu_index++; cpu_index++;
} }
return current; return current;
} }
int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,u32 gsi_base) int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,
u32 gsi_base)
{ {
ioapic->type=1; ioapic->type = 1; /* I/O APIC structure */
ioapic->length = sizeof(acpi_madt_ioapic_t); ioapic->length = sizeof(acpi_madt_ioapic_t);
ioapic->reserved = 0x00; ioapic->reserved = 0x00;
ioapic->gsi_base = gsi_base; ioapic->gsi_base = gsi_base;
ioapic->ioapic_id = id; ioapic->ioapic_id = id;
ioapic->ioapic_addr = addr; ioapic->ioapic_addr = addr;
return(ioapic->length); return ioapic->length;
} }
int acpi_create_madt_irqoverride(acpi_madt_irqoverride_t *irqoverride, int acpi_create_madt_irqoverride(acpi_madt_irqoverride_t *irqoverride,
u8 bus, u8 source, u32 gsirq, u16 flags) u8 bus, u8 source, u32 gsirq, u16 flags)
{ {
irqoverride->type=2; irqoverride->type = 2; /* Interrupt source override */
irqoverride->length = sizeof(acpi_madt_irqoverride_t); irqoverride->length = sizeof(acpi_madt_irqoverride_t);
irqoverride->bus = bus; irqoverride->bus = bus;
irqoverride->source = source; irqoverride->source = source;
irqoverride->gsirq = gsirq; irqoverride->gsirq = gsirq;
irqoverride->flags = flags; irqoverride->flags = flags;
return(irqoverride->length); return irqoverride->length;
} }
int acpi_create_madt_lapic_nmi(acpi_madt_lapic_nmi_t *lapic_nmi, u8 cpu, 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->type = 4; /* Local APIC NMI structure */
lapic_nmi->length = sizeof(acpi_madt_lapic_nmi_t); lapic_nmi->length = sizeof(acpi_madt_lapic_nmi_t);
lapic_nmi->flags = flags; lapic_nmi->flags = flags;
lapic_nmi->processor_id = cpu; lapic_nmi->processor_id = cpu;
lapic_nmi->lint = lint; lapic_nmi->lint = lint;
return(lapic_nmi->length); return lapic_nmi->length;
} }
void acpi_create_madt(acpi_madt_t *madt) void acpi_create_madt(acpi_madt_t *madt)
@ -194,35 +195,35 @@ void acpi_create_madt(acpi_madt_t *madt)
memset((void *)madt, 0, sizeof(acpi_madt_t)); memset((void *)madt, 0, sizeof(acpi_madt_t));
/* fill out header fields */ /* Fill out header fields. */
memcpy(header->signature, "APIC", 4); memcpy(header->signature, "APIC", 4);
memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4); memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_madt_t); 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->lapic_addr = LOCAL_APIC_ADDR;
madt->flags = 0x1; /* PCAT_COMPAT */ madt->flags = 0x1; /* PCAT_COMPAT */
current = acpi_fill_madt(current); current = acpi_fill_madt(current);
/* recalculate length */ /* (Re)calculate length and checksum. */
header->length = current - (unsigned long)madt; header->length = current - (unsigned long)madt;
header->checksum = acpi_checksum((void *)madt, header->length); 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) void acpi_create_mcfg(acpi_mcfg_t *mcfg)
{ {
acpi_header_t *header = &(mcfg->header); acpi_header_t *header = &(mcfg->header);
unsigned long current = (unsigned long)mcfg + sizeof(acpi_mcfg_t); unsigned long current = (unsigned long)mcfg + sizeof(acpi_mcfg_t);
memset((void *)mcfg, 0, sizeof(acpi_mcfg_t)); memset((void *)mcfg, 0, sizeof(acpi_mcfg_t));
/* fill out header fields */ /* Fill out header fields. */
memcpy(header->signature, "MCFG", 4); memcpy(header->signature, "MCFG", 4);
memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
@ -233,37 +234,40 @@ void acpi_create_mcfg(acpi_mcfg_t *mcfg)
current = acpi_fill_mcfg(current); current = acpi_fill_mcfg(current);
/* recalculate length */ /* (Re)calculate length and checksum. */
header->length = current - (unsigned long)mcfg; header->length = current - (unsigned long)mcfg;
header->checksum = acpi_checksum((void *)mcfg, header->length); header->checksum = acpi_checksum((void *)mcfg, header->length);
} }
/* this can be overriden by platform ACPI setup code, /*
* if it calls acpi_create_ssdt_generator * 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, unsigned long __attribute__((weak)) acpi_fill_ssdt_generator(
const char *oem_table_id) { unsigned long current, const char *oem_table_id)
{
return current; return current;
} }
void acpi_create_ssdt_generator(acpi_header_t *ssdt, const 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)); memset((void *)ssdt, 0, sizeof(acpi_header_t));
memcpy(&ssdt->signature, "SSDT", 4); memcpy(&ssdt->signature, "SSDT", 4);
ssdt->revision = 2; ssdt->revision = 2; /* ACPI 1.0/2.0: ?, ACPI 3.0/4.0: 2 */
memcpy(&ssdt->oem_id, OEM_ID, 6); memcpy(&ssdt->oem_id, OEM_ID, 6);
memcpy(&ssdt->oem_table_id, oem_table_id, 8); memcpy(&ssdt->oem_table_id, oem_table_id, 8);
ssdt->oem_revision = 42; ssdt->oem_revision = 42;
memcpy(&ssdt->asl_compiler_id, "CORE", 4); memcpy(&ssdt->asl_compiler_id, ASLC, 4);
ssdt->asl_compiler_revision = 42; ssdt->asl_compiler_revision = 42;
ssdt->length = sizeof(acpi_header_t); ssdt->length = sizeof(acpi_header_t);
acpigen_set_current((char *) current); acpigen_set_current((char *) current);
current = acpi_fill_ssdt_generator(current, oem_table_id); current = acpi_fill_ssdt_generator(current, oem_table_id);
/* recalculate length */ /* (Re)calculate length and checksum. */
ssdt->length = current - (unsigned long)ssdt; ssdt->length = current - (unsigned long)ssdt;
ssdt->checksum = acpi_checksum((void *)ssdt, ssdt->length); ssdt->checksum = acpi_checksum((void *)ssdt, ssdt->length);
} }
@ -271,86 +275,83 @@ void acpi_create_ssdt_generator(acpi_header_t *ssdt, const char *oem_table_id)
int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic) int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic)
{ {
memset((void *)lapic, 0, sizeof(acpi_srat_lapic_t)); memset((void *)lapic, 0, sizeof(acpi_srat_lapic_t));
lapic->type=0;
lapic->length=sizeof(acpi_srat_lapic_t);
lapic->flags=1;
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; lapic->proximity_domain_7_0 = node;
/* TODO: proximity_domain_31_8, local SAPIC EID, clock domain. */
lapic->apic_id = apic; 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->type = 1; /* Memory affinity structure */
mem->length = sizeof(acpi_srat_mem_t); mem->length = sizeof(acpi_srat_mem_t);
mem->base_address_low = (basek << 10); mem->base_address_low = (basek << 10);
mem->base_address_high = (basek >> (32 - 10)); mem->base_address_high = (basek >> (32 - 10));
mem->length_low = (sizek << 10); mem->length_low = (sizek << 10);
mem->length_high = (sizek >> (32 - 10)); mem->length_high = (sizek >> (32 - 10));
mem->proximity_domain = node; mem->proximity_domain = node;
mem->flags = flags; mem->flags = flags;
return(mem->length); return mem->length;
} }
/* http://www.microsoft.com/whdc/system/sysinternals/sratdwn.mspx */
void acpi_create_srat(acpi_srat_t *srat) void acpi_create_srat(acpi_srat_t *srat)
{ {
acpi_header_t *header = &(srat->header); acpi_header_t *header = &(srat->header);
unsigned long current = (unsigned long)srat + sizeof(acpi_srat_t); unsigned long current = (unsigned long)srat + sizeof(acpi_srat_t);
memset((void *)srat, 0, sizeof(acpi_srat_t)); memset((void *)srat, 0, sizeof(acpi_srat_t));
/* fill out header fields */ /* Fill out header fields. */
memcpy(header->signature, "SRAT", 4); memcpy(header->signature, "SRAT", 4);
memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4); memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_srat_t); header->length = sizeof(acpi_srat_t);
header->revision = 1; header->revision = 1; /* ACPI 1.0: N/A, 2.0: 1, 3.0: 2, 4.0: 3 */
srat->resv = 0x1; /* BACK COMP */ srat->resv = 1; /* Spec: Reserved to 1 for backwards compatibility. */
current = acpi_fill_srat(current); current = acpi_fill_srat(current);
/* recalculate length */ /* (Re)calculate length and checksum. */
header->length = current - (unsigned long)srat; header->length = current - (unsigned long)srat;
header->checksum = acpi_checksum((void *)srat, header->length); 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) void acpi_create_slit(acpi_slit_t *slit)
{ {
acpi_header_t *header = &(slit->header); acpi_header_t *header = &(slit->header);
unsigned long current = (unsigned long)slit + sizeof(acpi_slit_t); unsigned long current = (unsigned long)slit + sizeof(acpi_slit_t);
memset((void *)slit, 0, sizeof(acpi_slit_t)); memset((void *)slit, 0, sizeof(acpi_slit_t));
/* fill out header fields */ /* Fill out header fields. */
memcpy(header->signature, "SLIT", 4); memcpy(header->signature, "SLIT", 4);
memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4); memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_slit_t); header->length = sizeof(acpi_slit_t);
header->revision = 1; header->revision = 1; /* ACPI 1.0: N/A, ACPI 2.0/3.0/4.0: 1 */
current = acpi_fill_slit(current); current = acpi_fill_slit(current);
/* recalculate length */ /* (Re)calculate length and checksum. */
header->length = current - (unsigned long)slit; header->length = current - (unsigned long)slit;
header->checksum = acpi_checksum((void *)slit, header->length); header->checksum = acpi_checksum((void *)slit, header->length);
} }
/* http://www.intel.com/hardwaredesign/hpetspec_1.pdf */
void acpi_create_hpet(acpi_hpet_t *hpet) void acpi_create_hpet(acpi_hpet_t *hpet)
{ {
#define HPET_ADDR 0xfed00000ULL #define HPET_ADDR 0xfed00000ULL
@ -359,31 +360,31 @@ void acpi_create_hpet(acpi_hpet_t *hpet)
memset((void *)hpet, 0, sizeof(acpi_hpet_t)); memset((void *)hpet, 0, sizeof(acpi_hpet_t));
/* fill out header fields */ /* Fill out header fields. */
memcpy(header->signature, "HPET", 4); memcpy(header->signature, "HPET", 4);
memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4); memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_hpet_t); header->length = sizeof(acpi_hpet_t);
header->revision = 1; header->revision = 1; /* Currently 1. Table added in ACPI 2.0. */
/* fill out HPET address */ /* Fill out HPET address. */
addr->space_id = 0; /* Memory */ addr->space_id = 0; /* Memory */
addr->bit_width = 64; addr->bit_width = 64;
addr->bit_offset = 0; addr->bit_offset = 0;
addr->addrl = HPET_ADDR & 0xffffffff; addr->addrl = HPET_ADDR & 0xffffffff;
addr->addrh = HPET_ADDR >> 32; addr->addrh = HPET_ADDR >> 32;
hpet->id = 0x102282a0; /* AMD ? */ hpet->id = 0x102282a0; /* AMD! FIXME */
hpet->number = 0; hpet->number = 0;
hpet->min_tick = 4096; 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) 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);
@ -394,28 +395,25 @@ void acpi_create_facs(acpi_facs_t *facs)
facs->flags = 0; facs->flags = 0;
facs->x_firmware_waking_vector_l = 0; facs->x_firmware_waking_vector_l = 0;
facs->x_firmware_waking_vector_h = 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) void acpi_write_rsdt(acpi_rsdt_t *rsdt)
{ {
acpi_header_t *header = &(rsdt->header); acpi_header_t *header = &(rsdt->header);
/* fill out header fields */ /* Fill out header fields. */
memcpy(header->signature, "RSDT", 4); memcpy(header->signature, "RSDT", 4);
memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4); memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_rsdt_t); header->length = sizeof(acpi_rsdt_t);
header->revision = 1; header->revision = 1; /* ACPI 1.0/2.0/3.0/4.0: 1 */
/* fill out entries */ /* Entries are filled in later, we come with an empty set. */
// entries are filled in later, we come with an empty set.
/* fix checksum */
/* Fix checksum. */
header->checksum = acpi_checksum((void *)rsdt, sizeof(acpi_rsdt_t)); header->checksum = acpi_checksum((void *)rsdt, sizeof(acpi_rsdt_t));
} }
@ -423,34 +421,37 @@ void acpi_write_xsdt(acpi_xsdt_t *xsdt)
{ {
acpi_header_t *header = &(xsdt->header); acpi_header_t *header = &(xsdt->header);
/* fill out header fields */ /* Fill out header fields. */
memcpy(header->signature, "XSDT", 4); memcpy(header->signature, "XSDT", 4);
memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4); memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_xsdt_t); header->length = sizeof(acpi_xsdt_t);
header->revision = 1; header->revision = 1; /* ACPI 1.0: N/A, 2.0/3.0/4.0: 1 */
/* fill out entries */ /* Entries are filled in later, we come with an empty set. */
// entries are filled in later, we come with an empty set.
/* fix checksum */
/* Fix checksum. */
header->checksum = acpi_checksum((void *)xsdt, sizeof(acpi_xsdt_t)); 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) void acpi_write_rsdp(acpi_rsdp_t *rsdp, acpi_rsdt_t *rsdt, acpi_xsdt_t *xsdt)
{ {
memset(rsdp, 0, sizeof(acpi_rsdp_t)); memset(rsdp, 0, sizeof(acpi_rsdp_t));
memcpy(rsdp->signature, RSDP_SIG, 8); memcpy(rsdp->signature, RSDP_SIG, 8);
memcpy(rsdp->oem_id, OEM_ID, 6); memcpy(rsdp->oem_id, OEM_ID, 6);
rsdp->length = sizeof(acpi_rsdp_t); rsdp->length = sizeof(acpi_rsdp_t);
rsdp->rsdt_address = (u32)rsdt; rsdp->rsdt_address = (u32)rsdt;
/* 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) * 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) { if (xsdt == NULL) {
rsdp->revision = 0; rsdp->revision = 0;
@ -458,6 +459,8 @@ void acpi_write_rsdp(acpi_rsdp_t *rsdp, acpi_rsdt_t *rsdt, acpi_xsdt_t *xsdt)
rsdp->xsdt_address = (u64)(u32)xsdt; rsdp->xsdt_address = (u64)(u32)xsdt;
rsdp->revision = 2; rsdp->revision = 2;
} }
/* Calculate checksums. */
rsdp->checksum = acpi_checksum((void *)rsdp, 20); rsdp->checksum = acpi_checksum((void *)rsdp, 20);
rsdp->ext_checksum = acpi_checksum((void *)rsdp, sizeof(acpi_rsdp_t)); rsdp->ext_checksum = acpi_checksum((void *)rsdp, sizeof(acpi_rsdp_t));
} }
@ -478,13 +481,13 @@ void suspend_resume(void)
#error "And coreboot memory reserved in mainboard.c" #error "And coreboot memory reserved in mainboard.c"
#endif #endif
#endif #endif
/* if we happen to be resuming find wakeup vector and jump to OS */ /* If we happen to be resuming find wakeup vector and jump to OS. */
wake_vec = acpi_find_wakeup_vector(); wake_vec = acpi_find_wakeup_vector();
if (wake_vec) if (wake_vec)
acpi_jump_to_wakeup(wake_vec); acpi_jump_to_wakeup(wake_vec);
} }
/* this is to be filled by SB code - startup value what was found */ /* This is to be filled by SB code - startup value what was found. */
u8 acpi_slp_type = 0; u8 acpi_slp_type = 0;
static int acpi_is_wakeup(void) static int acpi_is_wakeup(void)
@ -506,7 +509,6 @@ static acpi_rsdp_t *valid_rsdp(acpi_rsdp_t *rsdp)
if ((rsdp->revision > 1) && (acpi_checksum((void *)rsdp, if ((rsdp->revision > 1) && (acpi_checksum((void *)rsdp,
rsdp->length) != 0)) rsdp->length) != 0))
return NULL; return NULL;
printk(BIOS_DEBUG, "Checksum 2 passed all OK\n"); printk(BIOS_DEBUG, "Checksum 2 passed all OK\n");
return rsdp; return rsdp;
@ -522,7 +524,6 @@ void *acpi_get_wakeup_rsdp(void)
void *acpi_find_wakeup_vector(void) void *acpi_find_wakeup_vector(void)
{ {
char *p, *end; char *p, *end;
acpi_rsdt_t *rsdt; acpi_rsdt_t *rsdt;
acpi_facs_t *facs; acpi_facs_t *facs;
acpi_fadt_t *fadt; acpi_fadt_t *fadt;
@ -536,7 +537,7 @@ void *acpi_find_wakeup_vector(void)
printk(BIOS_DEBUG, "Trying to find the wakeup vector...\n"); printk(BIOS_DEBUG, "Trying to find the wakeup vector...\n");
/* find RSDP */ /* Find RSDP. */
for (p = (char *)0xe0000; p < (char *)0xfffff; p += 16) { for (p = (char *)0xe0000; p < (char *)0xfffff; p += 16) {
if ((rsdp = valid_rsdp((acpi_rsdp_t *)p))) if ((rsdp = valid_rsdp((acpi_rsdp_t *)p)))
break; break;
@ -565,13 +566,15 @@ void *acpi_find_wakeup_vector(void)
facs = (acpi_facs_t *)fadt->firmware_ctrl; facs = (acpi_facs_t *)fadt->firmware_ctrl;
if (facs == NULL) { if (facs == NULL) {
printk(BIOS_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; return NULL;
} }
printk(BIOS_DEBUG, "FACS found at %p\n", facs); printk(BIOS_DEBUG, "FACS found at %p\n", facs);
wake_vec = (void *)facs->firmware_waking_vector; wake_vec = (void *)facs->firmware_waking_vector;
printk(BIOS_DEBUG, "OS waking vector is %p\n", wake_vec); printk(BIOS_DEBUG, "OS waking vector is %p\n", wake_vec);
return wake_vec; return wake_vec;
} }
@ -581,8 +584,8 @@ extern int lowmem_backup_size;
#define WAKEUP_BASE 0x600 #define WAKEUP_BASE 0x600
void (*acpi_do_wakeup)(u32 vector, u32 backup_source, u32 backup_target, u32 void (*acpi_do_wakeup)(u32 vector, u32 backup_source, u32 backup_target,
backup_size) __attribute__((regparm(0))) = (void *)WAKEUP_BASE; u32 backup_size) __attribute__((regparm(0))) = (void *)WAKEUP_BASE;
extern unsigned char __wakeup, __wakeup_size; extern unsigned char __wakeup, __wakeup_size;
@ -591,17 +594,22 @@ void acpi_jump_to_wakeup(void *vector)
u32 acpi_backup_memory = (u32)cbmem_find(CBMEM_ID_RESUME); u32 acpi_backup_memory = (u32)cbmem_find(CBMEM_ID_RESUME);
if (!acpi_backup_memory) { if (!acpi_backup_memory) {
printk(BIOS_WARNING, "ACPI: Backup memory missing. No S3 Resume.\n"); printk(BIOS_WARNING, "ACPI: Backup memory missing. "
"No S3 resume.\n");
return; return;
} }
// FIXME this should go into the ACPI backup memory, too. No pork saussages. // 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 */ /*
* Just restore the SMP trampoline and continue with wakeup on
* assembly level.
*/
memcpy(lowmem_backup_ptr, lowmem_backup, lowmem_backup_size); memcpy(lowmem_backup_ptr, lowmem_backup, lowmem_backup_size);
/* copy wakeup trampoline in place */ /* Copy wakeup trampoline in place. */
memcpy((void *)WAKEUP_BASE, &__wakeup, (size_t)&__wakeup_size); memcpy((void *)WAKEUP_BASE, &__wakeup, (size_t)&__wakeup_size);
acpi_do_wakeup((u32)vector, acpi_backup_memory, CONFIG_RAMBASE, HIGH_MEMORY_SAVE); acpi_do_wakeup((u32)vector, acpi_backup_memory, CONFIG_RAMBASE,
HIGH_MEMORY_SAVE);
} }
#endif #endif