u8 acpi_checksum(u8 *table, u32 length)
{
- u8 ret=0;
+ u8 ret = 0;
while (length--) {
ret += *table;
table++;
}
/**
- * 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)
{
int i, entries_num;
acpi_rsdt_t *rsdt;
acpi_xsdt_t *xsdt = NULL;
- /* The RSDT is mandatory ... */
+ /* The RSDT is mandatory... */
rsdt = (acpi_rsdt_t *)rsdp->rsdt_address;
- /* ... while the XSDT is not */
- if (rsdp->xsdt_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 */
+ /* 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)
+ if (rsdt->entry[i] == 0)
break;
}
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;
}
- /* Add table to the RSDT */
+ /* 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));
+ /* Fix RSDT length or the kernel will assume invalid entries. */
+ 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 = acpi_checksum((u8 *)rsdt,
- rsdt->header.length);
+ 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
+ /*
+ * 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;
+ /* Add table to the XSDT. */
+ xsdt->entry[i] = (u64)(u32)table;
- /* Fix XSDT length */
+ /* Fix XSDT length. */
xsdt->header.length = sizeof(acpi_header_t) +
- (sizeof(u64) * (i+1));
+ (sizeof(u64) * (i + 1));
- /* Re-calculate checksum */
- xsdt->header.checksum=0;
- xsdt->header.checksum=acpi_checksum((u8 *)xsdt,
- xsdt->header.length);
+ /* 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);
+ 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->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;
- lapic->processor_id=cpu;
- lapic->apic_id=apic;
-
- return(lapic->length);
+ return lapic->length;
}
unsigned long acpi_create_madt_lapics(unsigned long current)
device_t cpu;
int cpu_index = 0;
- for(cpu = all_devices; cpu; cpu = cpu->next) {
+ 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) {
+ if (!cpu->enabled)
continue;
- }
- current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, cpu_index, cpu->path.apic.apic_id);
+ 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)
+int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,
+ u32 gsi_base)
{
- 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);
+ 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;
+ 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);
+ 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 */
+ /* Fill out header fields. */
memcpy(header->signature, "APIC", 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_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;
+ /* (Re)calculate length and checksum. */
+ 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)
{
-
- 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 */
+ /* Fill out header fields. */
memcpy(header->signature, "MCFG", 4);
memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
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
+/*
+ * 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) {
+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, 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", 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_table_id, oem_table_id, 8);
ssdt->oem_revision = 42;
- memcpy(&ssdt->asl_compiler_id, "CORE", 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->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);
+ 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));
+ memset((void *)srat, 0, sizeof(acpi_srat_t));
- /* 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);
-
- 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", 4);
- memcpy(header->oem_id, OEM_ID, 6);
- memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 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 */
+ /* Fill out header fields. */
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);
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;
+ /* 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;
+ hpet->id = 0x102282a0; /* AMD! FIXME */
+ 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);
facs->length = sizeof(acpi_facs_t);
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);
+ acpi_header_t *header = &(rsdt->header);
- /* fill out header fields */
+ /* Fill out header fields. */
memcpy(header->signature, "RSDT", 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_rsdt_t);
- header->revision = 1;
-
- /* fill out entries */
-
- // entries are filled in later, we come with an empty set.
+ header->revision = 1; /* ACPI 1.0/2.0/3.0/4.0: 1 */
- /* fix checksum */
+ /* 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_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->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;
-
- /* fill out entries */
-
- // entries are filled in later, we come with an empty set.
+ header->revision = 1; /* ACPI 1.0: N/A, 2.0/3.0/4.0: 1 */
- /* fix checksum */
+ /* 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;
- /* 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)
+
+ 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;
+ rsdp->revision = 0;
} else {
- rsdp->xsdt_address = (u64)(u32)xsdt;
- rsdp->revision = 2;
+ rsdp->xsdt_address = (u64)(u32)xsdt;
+ rsdp->revision = 2;
}
- rsdp->checksum = acpi_checksum((void *)rsdp, 20);
- rsdp->ext_checksum = acpi_checksum((void *)rsdp, sizeof(acpi_rsdp_t));
+
+ /* 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
#error "And coreboot memory reserved in mainboard.c"
#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();
if (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;
static int acpi_is_wakeup(void)
if ((rsdp->revision > 1) && (acpi_checksum((void *)rsdp,
rsdp->length) != 0))
return NULL;
-
printk(BIOS_DEBUG, "Checksum 2 passed all OK\n");
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;
+ void *wake_vec;
int i;
rsdp = NULL;
if (!acpi_is_wakeup())
return NULL;
- printk(BIOS_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 = valid_rsdp((acpi_rsdp_t *) p)))
+ /* Find RSDP. */
+ for (p = (char *)0xe0000; p < (char *)0xfffff; p += 16) {
+ if ((rsdp = valid_rsdp((acpi_rsdp_t *)p)))
break;
}
printk(BIOS_DEBUG, "RSDP found at %p\n", rsdp);
rsdt = (acpi_rsdt_t *) rsdp->rsdt_address;
- end = (char *) rsdt + rsdt->header.length;
+ 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];
+ 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;
facs = (acpi_facs_t *)fadt->firmware_ctrl;
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;
}
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);
+
return wake_vec;
}
extern char *lowmem_backup_ptr;
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
- backup_size) __attribute__((regparm(0))) = (void *)WAKEUP_BASE;
+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);
+ 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");
+ 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 */
+ // 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 */
+ /* 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);
+ acpi_do_wakeup((u32)vector, acpi_backup_memory, CONFIG_RAMBASE,
+ HIGH_MEMORY_SAVE);
}
#endif
projects / coreboot.git / commitdiff