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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35897 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini
2010-03-18 06:31:01 +00:00
parent 64c15cfc27
commit 43e738bd36
1 changed files with 30 additions and 23 deletions
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src/system/boot/platform/bios_ia32/acpi.cpp
+18 -11
View File
@@ -35,6 +35,7 @@ static struct scan_spots_struct acpi_scan_spots[] = {
static acpi_descriptor_header* sAcpiRsdt; // System Description Table
static int32 sNumEntries = -1;
static status_t
acpi_check_rsdt(acpi_rsdp* rsdp)
{
@@ -44,8 +45,10 @@ acpi_check_rsdt(acpi_rsdp *rsdp)
// map and validate the root system description table
acpi_descriptor_header* rsdt
= (acpi_descriptor_header*)mmu_map_physical_memory(
rsdp->rsdt_address, sizeof(acpi_descriptor_header), kDefaultPageFlags);
if (rsdt == NULL || strncmp(rsdt->signature, ACPI_RSDT_SIGNATURE, 4) != 0) {
rsdp->rsdt_address, sizeof(acpi_descriptor_header),
kDefaultPageFlags);
if (rsdt == NULL
|| strncmp(rsdt->signature, ACPI_RSDT_SIGNATURE, 4) != 0) {
if (rsdt != NULL)
mmu_free(rsdt, sizeof(acpi_descriptor_header));
TRACE(("acpi: invalid root system description table\n"));
@@ -63,8 +66,10 @@ acpi_find_table(const char *signature)
if (sAcpiRsdt == NULL)
return NULL;
if (sNumEntries == -1)
sNumEntries = (sAcpiRsdt->length - sizeof(acpi_descriptor_header)) / 4;
if (sNumEntries == -1) {
sNumEntries = (sAcpiRsdt->length
- sizeof(acpi_descriptor_header)) / 4;
}
if (sNumEntries <= 0) {
TRACE(("acpi: root system description table is empty\n"));
@@ -79,14 +84,15 @@ acpi_find_table(const char *signature)
for (int32 j = 0; j < sNumEntries; j++, pointer++) {
acpi_descriptor_header* header = (acpi_descriptor_header*)
mmu_map_physical_memory(*pointer, sizeof(acpi_descriptor_header),
kDefaultPageFlags);
if (header == NULL || strncmp(header->signature, signature, 4) != 0) {
mmu_map_physical_memory(*pointer,
sizeof(acpi_descriptor_header), kDefaultPageFlags);
if (header == NULL
|| strncmp(header->signature, signature, 4) != 0) {
// not interesting for us
if (header != NULL)
mmu_free(header, sizeof(acpi_descriptor_header));
TRACE(("acpi: Looking for '%.4s'. Skipping '%.4s'\n", signature,
header->signature));
TRACE(("acpi: Looking for '%.4s'. Skipping '%.4s'\n",
signature, header->signature));
continue;
}
TRACE(("acpi: Found '%.4s' @ %p\n", signature, pointer));
@@ -99,7 +105,7 @@ acpi_find_table(const char *signature)
void
acpi_init(void)
acpi_init()
{
// Try to find the ACPI RSDP.
for (int32 i = 0; acpi_scan_spots[i].length > 0; i++) {
@@ -111,7 +117,8 @@ acpi_init(void)
for (char* pointer = (char*)acpi_scan_spots[i].start;
(uint32)pointer < acpi_scan_spots[i].stop; pointer += 16) {
if (strncmp(pointer, ACPI_RSDP_SIGNATURE, 8) == 0) {
TRACE(("acpi_init: found ACPI RSDP signature at %p\n", pointer));
TRACE(("acpi_init: found ACPI RSDP signature at %p\n",
pointer));
rsdp = (acpi_rsdp*)pointer;
}
}