fix/kernel: Fixed MADT tables to use

acpi_madt_entry_t header;

GNUmakefile

@@ -2,7 +2,7 @@
 MAKEFLAGS += -rR
 .SUFFIXES:
 
-QEMUFLAGS := -m 2G -serial stdio
+QEMUFLAGS := -m 2G -serial stdio -smp 4
 USER_QEMUFLAGS ?=
 IMAGE_NAME := release/emk
 

kernel/src/emk.c

@@ -18,6 +18,7 @@
 #include <flanterm/backends/fb.h>
 #endif // FLANTERM_SUPPORT
 #include <sys/acpi.h>
+#include <sys/acpi/madt.h>
 
 __attribute__((used, section(".limine_requests"))) static volatile LIMINE_BASE_REVISION(3);
 __attribute__((used, section(".limine_requests"))) static volatile struct limine_memmap_request memmap_request = {
@@ -37,6 +38,9 @@ __attribute__((used, section(".limine_requests"))) volatile struct limine_frameb
 __attribute__((used, section(".limine_requests"))) static volatile struct limine_rsdp_request rsdp_request = {
     .revision = 0,
     .id = LIMINE_RSDP_REQUEST};
+__attribute__((used, section(".limine_requests"))) static volatile struct limine_mp_request mp_request = {
+    .revision = 0,
+    .id = LIMINE_MP_REQUEST};
 __attribute__((used, section(".limine_requests_start"))) static volatile LIMINE_REQUESTS_START_MARKER;
 __attribute__((used, section(".limine_requests_end"))) static volatile LIMINE_REQUESTS_END_MARKER;
 
@@ -171,7 +175,7 @@ void emk_entry(void)
     acpi_init();
     log_early("Initialized ACPI");
 
-    void *madt = acpi_find_table("APIC");
+    acpi_madt_t *madt = (acpi_madt_t *)acpi_find_table("APIC");
     if (!madt)
     {
         kpanic(NULL, "Failed to find MADT table");
@@ -179,5 +183,12 @@ void emk_entry(void)
 
     log_early("Found MADT at %p", madt);
 
+    if (!mp_request.response)
+    {
+        kpanic(NULL, "Failed to get MP request");
+    }
+
+    log_early("%d available cores", mp_request.response->cpu_count);
+
     hlt();
 }

kernel/src/sys/acpi/madt.h

@@ -30,8 +30,7 @@ typedef struct acpi_madt_entry
 /* Entry Type 0: Processor Local APIC */
 typedef struct acpi_madt_lapic
 {
-    uint8_t type;
+    acpi_madt_entry_t header;
-    uint8_t length;
     uint8_t acpi_proc_id; /* ACPI Processor ID */
     uint8_t apic_id;      /* APIC ID */
     uint32_t flags;       /* Bit 0: Processor Enabled, Bit 1: Online Capable */
@@ -40,8 +39,7 @@ typedef struct acpi_madt_lapic
 /* Entry Type 1: I/O APIC */
 typedef struct acpi_madt_ioapic
 {
-    uint8_t type;
+    acpi_madt_entry_t header;
-    uint8_t length;
     uint8_t ioapic_id;    /* I/O APIC's ID */
     uint8_t reserved;     /* Reserved (0) */
     uint32_t ioapic_addr; /* I/O APIC Address */
@@ -51,8 +49,7 @@ typedef struct acpi_madt_ioapic
 /* Entry Type 2: I/O APIC Interrupt Source Override */
 typedef struct acpi_madt_ioapic_src_ovr
 {
-    uint8_t type;
+    acpi_madt_entry_t header;
-    uint8_t length;
     uint8_t bus_source; /* Bus Source */
     uint8_t irq_source; /* IRQ Source */
     uint32_t gsi;       /* Global System Interrupt */
@@ -62,8 +59,7 @@ typedef struct acpi_madt_ioapic_src_ovr
 /* Entry Type 3: I/O APIC Non-Maskable Interrupt Source */
 typedef struct acpi_madt_ioapic_nmi_src
 {
-    uint8_t type;
+    acpi_madt_entry_t header;
-    uint8_t length;
     uint8_t nmi_source; /* NMI Source */
     uint8_t reserved;   /* Reserved */
     uint16_t flags;     /* Flags */
@@ -73,8 +69,7 @@ typedef struct acpi_madt_ioapic_nmi_src
 /* Entry Type 4: Local APIC Non-Maskable Interrupt */
 typedef struct acpi_madt_lapic_nmi
 {
-    uint8_t type;
+    acpi_madt_entry_t header;
-    uint8_t length;
     uint8_t acpi_proc_id; /* ACPI Processor ID (0xFF for all processors) */
     uint16_t flags;       /* Flags */
     uint8_t lint;         /* LINT# (0 or 1) */
@@ -83,8 +78,7 @@ typedef struct acpi_madt_lapic_nmi
 /* Entry Type 5: Local APIC Address Override */
 typedef struct acpi_madt_lapic_addr_ovr
 {
-    uint8_t type;
+    acpi_madt_entry_t header;
-    uint8_t length;
     uint16_t reserved;   /* Reserved */
     uint64_t lapic_addr; /* 64-bit Physical Address of Local APIC */
 } __attribute__((packed)) acpi_madt_lapic_addr_ovr_t;
@@ -92,8 +86,7 @@ typedef struct acpi_madt_lapic_addr_ovr
 /* Entry Type 9: Processor Local x2APIC */
 typedef struct acpi_madt_lx2apic
 {
-    uint8_t type;
+    acpi_madt_entry_t header;
-    uint8_t length;
     uint16_t reserved;
     uint32_t x2apic_id; /* Processor's Local x2APIC ID */
     uint32_t flags;     /* Flags (same as Local APIC) */