unsigned long write_acpi_tables(unsigned long start)
{
unsigned long current;
acpi_rsdp_t *rsdp;
acpi_rsdt_t *rsdt;
acpi_xsdt_t *xsdt;
acpi_hpet_t *hpet;
acpi_madt_t *madt;
acpi_mcfg_t *mcfg;
acpi_fadt_t *fadt;
acpi_facs_t *facs;
#if CONFIG_HAVE_ACPI_SLIC
acpi_header_t *slic;
#endif
acpi_header_t *ssdt;
acpi_header_t *dsdt;
current = fw_cfg_acpi_tables(start);
if (current)
return current;
current = start;
/* Align ACPI tables to 16byte */
ALIGN_CURRENT;
printk(BIOS_INFO, "ACPI: Writing ACPI tables at %lx.\n", start);
/* We need at least an RSDP and an RSDT Table */
rsdp = (acpi_rsdp_t *) current;
current += sizeof(acpi_rsdp_t);
ALIGN_CURRENT;
rsdt = (acpi_rsdt_t *) current;
current += sizeof(acpi_rsdt_t);
ALIGN_CURRENT;
xsdt = (acpi_xsdt_t *) current;
current += sizeof(acpi_xsdt_t);
ALIGN_CURRENT;
/* clear all table memory */
memset((void *) start, 0, current - start);
acpi_write_rsdp(rsdp, rsdt, xsdt);
acpi_write_rsdt(rsdt);
acpi_write_xsdt(xsdt);
/*
* We explicitly add these tables later on:
*/
printk(BIOS_DEBUG, "ACPI: * HPET\n");
hpet = (acpi_hpet_t *) current;
current += sizeof(acpi_hpet_t);
ALIGN_CURRENT;
acpi_create_hpet(hpet);
acpi_add_table(rsdp, hpet);
/* If we want to use HPET Timers Linux wants an MADT */
printk(BIOS_DEBUG, "ACPI: * MADT\n");
madt = (acpi_madt_t *) current;
acpi_create_madt(madt);
current += madt->header.length;
ALIGN_CURRENT;
acpi_add_table(rsdp, madt);
printk(BIOS_DEBUG, "ACPI: * MCFG\n");
mcfg = (acpi_mcfg_t *) current;
acpi_create_mcfg(mcfg);
current += mcfg->header.length;
ALIGN_CURRENT;
acpi_add_table(rsdp, mcfg);
printk(BIOS_DEBUG, "ACPI: * FACS\n");
facs = (acpi_facs_t *) current;
current += sizeof(acpi_facs_t);
ALIGN_CURRENT;
acpi_create_facs(facs);
dsdt = (acpi_header_t *) current;
memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
current += dsdt->length;
memcpy(dsdt, &AmlCode, dsdt->length);
ALIGN_CURRENT;
/* We patched up the DSDT, so we need to recalculate the checksum */
dsdt->checksum = 0;
dsdt->checksum = acpi_checksum((void *)dsdt, dsdt->length);
printk(BIOS_DEBUG, "ACPI: * DSDT @ %p Length %x\n", dsdt,
dsdt->length);
#if CONFIG_HAVE_ACPI_SLIC
printk(BIOS_DEBUG, "ACPI: * SLIC\n");
slic = (acpi_header_t *)current;
current += acpi_create_slic(current);
ALIGN_CURRENT;
acpi_add_table(rsdp, slic);
#endif
printk(BIOS_DEBUG, "ACPI: * FADT\n");
fadt = (acpi_fadt_t *) current;
current += sizeof(acpi_fadt_t);
ALIGN_CURRENT;
acpi_create_fadt(fadt, facs, dsdt);
acpi_add_table(rsdp, fadt);
printk(BIOS_DEBUG, "ACPI: * SSDT\n");
ssdt = (acpi_header_t *)current;
acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
current += ssdt->length;
acpi_add_table(rsdp, ssdt);
ALIGN_CURRENT;
printk(BIOS_DEBUG, "current = %lx\n", current);
printk(BIOS_INFO, "ACPI: done.\n");
return current;
}
unsigned long write_acpi_tables(unsigned long start)
{
unsigned long current;
acpi_rsdp_t *rsdp;
acpi_rsdt_t *rsdt;
acpi_xsdt_t *xsdt;
acpi_fadt_t *fadt;
acpi_facs_t *facs;
acpi_header_t *slic_file, *slic;
acpi_header_t *ssdt;
acpi_header_t *dsdt_file, *dsdt;
acpi_mcfg_t *mcfg;
acpi_tcpa_t *tcpa;
acpi_madt_t *madt;
struct device *dev;
unsigned long fw;
size_t slic_size, dsdt_size;
char oem_id[6], oem_table_id[8];
current = start;
/* Align ACPI tables to 16byte */
current = acpi_align_current(current);
fw = fw_cfg_acpi_tables(current);
if (fw)
return fw;
#if CONFIG_COMPILE_IN_DSDT
extern char _binary_dsdt_aml_start;
extern char _binary_dsdt_aml_end;
dsdt_file = (acpi_header_t *)&_binary_dsdt_aml_start;
dsdt_size = (size_t)(&_binary_dsdt_aml_end - &_binary_dsdt_aml_start);
#else
dsdt_file = cbfs_boot_map_with_leak(
CONFIG_CBFS_PREFIX "/dsdt.aml",
CBFS_TYPE_RAW, &dsdt_size);
#endif
if (!dsdt_file) {
printk(BIOS_ERR, "No DSDT file, skipping ACPI tables\n");
return current;
}
if (dsdt_file->length > dsdt_size
|| dsdt_file->length < sizeof (acpi_header_t)
|| memcmp(dsdt_file->signature, "DSDT", 4) != 0) {
printk(BIOS_ERR, "Invalid DSDT file, skipping ACPI tables\n");
return current;
}
slic_file = cbfs_boot_map_with_leak(CONFIG_CBFS_PREFIX "/slic",
CBFS_TYPE_RAW, &slic_size);
if (slic_file
&& (slic_file->length > slic_size
|| slic_file->length < sizeof (acpi_header_t)
|| memcmp(slic_file->signature, "SLIC", 4) != 0)) {
slic_file = 0;
}
if (slic_file) {
memcpy(oem_id, slic_file->oem_id, 6);
memcpy(oem_table_id, slic_file->oem_table_id, 8);
} else {
memcpy(oem_id, OEM_ID, 6);
memcpy(oem_table_id, ACPI_TABLE_CREATOR, 8);
}
printk(BIOS_INFO, "ACPI: Writing ACPI tables at %lx.\n", start);
/* We need at least an RSDP and an RSDT Table */
rsdp = (acpi_rsdp_t *) current;
current += sizeof(acpi_rsdp_t);
current = acpi_align_current(current);
rsdt = (acpi_rsdt_t *) current;
current += sizeof(acpi_rsdt_t);
current = acpi_align_current(current);
xsdt = (acpi_xsdt_t *) current;
current += sizeof(acpi_xsdt_t);
current = acpi_align_current(current);
/* clear all table memory */
memset((void *) start, 0, current - start);
acpi_write_rsdp(rsdp, rsdt, xsdt, oem_id);
acpi_write_rsdt(rsdt, oem_id, oem_table_id);
acpi_write_xsdt(xsdt, oem_id, oem_table_id);
printk(BIOS_DEBUG, "ACPI: * FACS\n");
current = (ALIGN(current, 64));
facs = (acpi_facs_t *) current;
current += sizeof(acpi_facs_t);
current = acpi_align_current(current);
acpi_create_facs(facs);
printk(BIOS_DEBUG, "ACPI: * DSDT\n");
dsdt = (acpi_header_t *) current;
memcpy(dsdt, dsdt_file, sizeof(acpi_header_t));
if (dsdt->length >= sizeof(acpi_header_t)) {
current += sizeof(acpi_header_t);
acpigen_set_current((char *) current);
for (dev = all_devices; dev; dev = dev->next)
if (dev->ops && dev->ops->acpi_inject_dsdt_generator) {
dev->ops->acpi_inject_dsdt_generator(dev);
}
current = (unsigned long) acpigen_get_current();
memcpy((char *)current,
(char *)dsdt_file + sizeof(acpi_header_t),
dsdt->length - sizeof(acpi_header_t));
current += dsdt->length - sizeof(acpi_header_t);
/* (Re)calculate length and checksum. */
dsdt->length = current - (unsigned long)dsdt;
dsdt->checksum = 0;
dsdt->checksum = acpi_checksum((void *)dsdt, dsdt->length);
}
current = acpi_align_current(current);
printk(BIOS_DEBUG, "ACPI: * FADT\n");
fadt = (acpi_fadt_t *) current;
current += sizeof(acpi_fadt_t);
current = acpi_align_current(current);
acpi_create_fadt(fadt, facs, dsdt);
acpi_add_table(rsdp, fadt);
if (slic_file) {
printk(BIOS_DEBUG, "ACPI: * SLIC\n");
slic = (acpi_header_t *)current;
memcpy(slic, slic_file, slic_file->length);
current += slic_file->length;
current = acpi_align_current(current);
acpi_add_table(rsdp, slic);
}
printk(BIOS_DEBUG, "ACPI: * SSDT\n");
ssdt = (acpi_header_t *)current;
acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
if (ssdt->length > sizeof(acpi_header_t)) {
current += ssdt->length;
acpi_add_table(rsdp, ssdt);
current = acpi_align_current(current);
}
printk(BIOS_DEBUG, "ACPI: * MCFG\n");
mcfg = (acpi_mcfg_t *) current;
acpi_create_mcfg(mcfg);
if (mcfg->header.length > sizeof(acpi_mcfg_t)) {
current += mcfg->header.length;
current = acpi_align_current(current);
acpi_add_table(rsdp, mcfg);
}
printk(BIOS_DEBUG, "ACPI: * TCPA\n");
tcpa = (acpi_tcpa_t *) current;
acpi_create_tcpa(tcpa);
if (tcpa->header.length >= sizeof(acpi_tcpa_t)) {
current += tcpa->header.length;
current = acpi_align_current(current);
acpi_add_table(rsdp, tcpa);
}
printk(BIOS_DEBUG, "ACPI: * MADT\n");
madt = (acpi_madt_t *) current;
acpi_create_madt(madt);
if (madt->header.length > sizeof(acpi_madt_t)) {
current+=madt->header.length;
acpi_add_table(rsdp,madt);
}
current = acpi_align_current(current);
printk(BIOS_DEBUG, "current = %lx\n", current);
for (dev = all_devices; dev; dev = dev->next) {
if (dev->ops && dev->ops->write_acpi_tables) {
current = dev->ops->write_acpi_tables(dev, current, rsdp);
current = acpi_align_current(current);
}
}
printk(BIOS_INFO, "ACPI: done.\n");
return current;
}