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RSDT detection successfull

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This commit is contained in:
Adrien Bourmault 2020-02-03 15:34:20 +01:00
parent 06c62b78a5
commit 327f63f3a9
3 changed files with 83 additions and 5 deletions
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29
include/io/acpi.h
View File

@ -32,20 +32,45 @@
//----------------------------------------------------------------------------//
//
// ACPI 2.0 Legacy descriptor
// ACPI 1.0 descriptor
//
struct RSDPDescriptor {
struct RSDPLegacy {
char signature[8];
uchar checksum;
char OEMID[6];
uchar revision;
uint rsdtAddress;
} __attribute__ ((packed));
//
// ACPI 2.0 descriptor
//
struct RSDPDescriptor {
// RSDT ACPI 1.0 and above
struct RSDPLegacy legacy;
// RSDT ACPI 2.0
uint length;
ulong xsdtAddress;
uchar extendedChecksum;
uchar reserved[3];
} __attribute__ ((packed));
//
// ACPI System Description Table
//
struct SDTHeader {
char signature[4];
uint length;
uchar revision;
uchar checksum;
char OEMID[6];
char OEMTableID[8];
uint OEMRevision;
uint creatorID;
uint creatorRevision;
};
//----------------------------------------------------------------------------//
void IoTestAcpi(void);

1
include/kernel.h
View File

@ -57,6 +57,7 @@ typedef struct ISRList_t ISRList_t;
typedef struct ISRFrame_t ISRFrame_t;
typedef struct RSDPDescriptor RSDPDescriptor;
typedef struct SDTHeader SDTHeader;
typedef struct MemoryMap_t MemoryMap_t;
typedef struct MapEntry_t MapEntry_t;

58
kaleid/kernel/io/acpi.c
View File

@ -25,9 +25,25 @@
#include <init/boot.h>
#include <io/vga.h>
#include <io/acpi.h>
#include <mm/paging.h>
SDTHeader *AcpiSDHeader = NULL;
static inline char DoChecksum(void *ptr, size_t size,
size_t intermediateSize, ulong reason)
{
char checksum = 0;
for (ulong i=0; i < (ulong)size; i++) {
if (reason && i > (ulong)intermediateSize)
break;
checksum += (uchar)((char*)ptr)[i];
}
return checksum;
}
void IoTestAcpi(void)
{
uchar checksum = 0;
if (BtFirmwareInfo.romValid)
KernLog("\tRom Table is valid at %p\n", BtFirmwareInfo.romTable);
@ -35,14 +51,50 @@ void IoTestAcpi(void)
if (BtFirmwareInfo.apmValid)
KernLog("\tApm Table is valid at %p\n", BtFirmwareInfo.apmTable);
// FIND RSDP
RSDPDescriptor *rsdp = IoFindRSDP();
if (!rsdp)
return;
KeStartPanic("ACPI RSDP not found in memory");
KernLog("\tFound ACPI RSDP (%s) version %d at %p\n",
rsdp->OEMID, (uint)rsdp->revision, rsdp
// Checksum calculation
checksum = DoChecksum(rsdp, (size_t)sizeof(RSDPDescriptor),
(size_t)sizeof(struct RSDPLegacy),
!rsdp->legacy.revision
);
if (checksum)
KeStartPanic("Invalid checksum : %d vs 0", checksum);
if (rsdp->legacy.revision == 1 || rsdp->legacy.revision >= 3)
KeStartPanic("Invalid ACPI Revision : %d", rsdp->legacy.revision);
KernLog("\tACPI Root System Table (OEM %s) Revision %d at %p\n",
rsdp->legacy.OEMID,
(uint)rsdp->legacy.revision,
rsdp->legacy.rsdtAddress
);
AcpiSDHeader = (SDTHeader *)(ulong)rsdp->legacy.rsdtAddress;
if (rsdp->legacy.revision) {
KernLog("\tFound ACPI Extended System Table (OEM %s) Revision %d at %p\n",
rsdp->legacy.OEMID,
(uint)rsdp->legacy.revision,
rsdp->xsdtAddress
);
AcpiSDHeader = (SDTHeader *)rsdp->xsdtAddress;
}
// Map the Table Header
for (ulong i = 0; i < (sizeof(AcpiSDHeader)/KPAGESIZE) + 1; i++) {
MmMapPage((void*)((ulong)(AcpiSDHeader) + i*KPAGESIZE),
(void*)((ulong)(AcpiSDHeader) + i*KPAGESIZE),
PRESENT);
}
return;
}