linux: Initial support for 32 bit boot protocol instead of 16 bit one
This commit is contained in:
mintsuki
parent
0cc0e019cd
commit
cd3a64c9f1
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@ -109,11 +109,7 @@ void stage3_common(void) {
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stivale2_load(config, cmdline, boot_volume->pxe, efi_system_table);
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stivale2_load(config, cmdline, boot_volume->pxe, efi_system_table);
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} else if (!strcmp(proto, "linux")) {
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} else if (!strcmp(proto, "linux")) {
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#if defined (bios)
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linux_load(config, cmdline);
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linux_load(config, cmdline);
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#elif defined (uefi)
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panic("UEFI Limine does not support the Linux boot protocol");
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#endif
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} else if (!strcmp(proto, "chainload")) {
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} else if (!strcmp(proto, "chainload")) {
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#if defined (bios)
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#if defined (bios)
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chainload(config);
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chainload(config);
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@ -10,9 +10,13 @@ section .text
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mov dword [rsp], %1
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mov dword [rsp], %1
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%endmacro
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%endmacro
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extern gdt
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global do_32
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global do_32
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bits 64
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bits 64
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do_32:
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do_32:
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lgdt [rel gdt]
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mov rbp, rsp
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mov rbp, rsp
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lidt [rel invalid_idt]
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lidt [rel invalid_idt]
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@ -6,6 +6,7 @@
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#include <stdbool.h>
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#include <stdbool.h>
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#include <sys/e820.h>
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#include <sys/e820.h>
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#define MEMMAP_REMOVE_RANGE 0
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#define MEMMAP_USABLE 1
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#define MEMMAP_USABLE 1
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#define MEMMAP_RESERVED 2
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#define MEMMAP_RESERVED 2
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#define MEMMAP_ACPI_RECLAIMABLE 3
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#define MEMMAP_ACPI_RECLAIMABLE 3
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@ -15,6 +16,9 @@
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#define MEMMAP_KERNEL_AND_MODULES 0x1001
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#define MEMMAP_KERNEL_AND_MODULES 0x1001
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#define MEMMAP_EFI_RECLAIMABLE 0x2000
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#define MEMMAP_EFI_RECLAIMABLE 0x2000
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extern size_t bump_allocator_base;
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extern size_t bump_allocator_limit;
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extern struct e820_entry_t memmap[];
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extern struct e820_entry_t memmap[];
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extern size_t memmap_entries;
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extern size_t memmap_entries;
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@ -19,13 +19,13 @@
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#if defined (bios)
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#if defined (bios)
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extern symbol bss_end;
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extern symbol bss_end;
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static size_t bump_allocator_base = (size_t)bss_end;
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size_t bump_allocator_base = (size_t)bss_end;
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static size_t bump_allocator_limit = BUMP_ALLOC_LIMIT_HIGH;
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size_t bump_allocator_limit = BUMP_ALLOC_LIMIT_HIGH;
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#endif
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#endif
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#if defined (uefi)
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#if defined (uefi)
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static size_t bump_allocator_base = BUMP_ALLOC_LIMIT_HIGH;
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size_t bump_allocator_base = BUMP_ALLOC_LIMIT_HIGH;
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static size_t bump_allocator_limit = BUMP_ALLOC_LIMIT_HIGH;
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size_t bump_allocator_limit = BUMP_ALLOC_LIMIT_HIGH;
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#endif
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#endif
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void *conv_mem_alloc(size_t count) {
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void *conv_mem_alloc(size_t count) {
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@ -342,7 +342,7 @@ void init_memmap(void) {
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memmap_alloc_range(bump_allocator_base,
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memmap_alloc_range(bump_allocator_base,
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bump_allocator_limit - bump_allocator_base,
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bump_allocator_limit - bump_allocator_base,
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MEMMAP_RESERVED, true, true);
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MEMMAP_REMOVE_RANGE, true, true);
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print("pmm: Conventional mem allocator base: %X\n", bump_allocator_base);
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print("pmm: Conventional mem allocator base: %X\n", bump_allocator_base);
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print("pmm: Conventional mem allocator limit: %X\n", bump_allocator_limit);
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print("pmm: Conventional mem allocator limit: %X\n", bump_allocator_limit);
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@ -440,30 +440,48 @@ bool memmap_alloc_range(uint64_t base, uint64_t length, uint32_t type, bool free
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uint64_t entry_top = memmap[i].base + memmap[i].length;
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uint64_t entry_top = memmap[i].base + memmap[i].length;
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uint32_t entry_type = memmap[i].type;
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uint32_t entry_type = memmap[i].type;
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if (type == MEMMAP_REMOVE_RANGE &&
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base == entry_base && top == entry_top) {
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// Eradicate from memmap
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for (size_t j = i; j < memmap_entries - 1; j++) {
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memmap[j] = memmap[j+1];
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}
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memmap_entries--;
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return true;
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}
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if (base >= entry_base && base < entry_top &&
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if (base >= entry_base && base < entry_top &&
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top >= entry_base && top <= entry_top) {
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top >= entry_base && top <= entry_top) {
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struct e820_entry_t *target;
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struct e820_entry_t *target;
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memmap[i].length -= entry_top - base;
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memmap[i].length -= entry_top - base;
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if (memmap[i].length == 0) {
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if (type != MEMMAP_REMOVE_RANGE) {
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target = &memmap[i];
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if (memmap[i].length == 0) {
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} else {
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target = &memmap[i];
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if (memmap_entries >= MEMMAP_MAX_ENTRIES)
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} else {
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panic("Memory map exhausted.");
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if (memmap_entries >= MEMMAP_MAX_ENTRIES)
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panic("Memory map exhausted.");
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target = &memmap[memmap_entries++];
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target = &memmap[memmap_entries++];
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}
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target->type = type;
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target->base = base;
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target->length = length;
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}
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}
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target->type = type;
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target->base = base;
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target->length = length;
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if (top < entry_top) {
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if (top < entry_top) {
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if (memmap_entries >= MEMMAP_MAX_ENTRIES)
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if (memmap[i].length == 0) {
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panic("Memory map exhausted.");
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target = &memmap[i];
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} else {
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if (memmap_entries >= MEMMAP_MAX_ENTRIES)
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panic("Memory map exhausted.");
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target = &memmap[memmap_entries++];
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target = &memmap[memmap_entries++];
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}
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target->type = entry_type;
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target->type = entry_type;
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target->base = top;
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target->base = top;
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@ -0,0 +1,63 @@
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#include <sys/gdt.h>
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__attribute__((noreturn)) void linux_spinup(void *entry, void *boot_params) {
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struct gdt_desc linux_gdt_descs[] = {
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{0},
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{0},
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{
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.limit = 0xffff,
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.base_low = 0x0000,
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.base_mid = 0x00,
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.access = 0b10011010,
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.granularity = 0b11001111,
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.base_hi = 0x00
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},
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{
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.limit = 0xffff,
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.base_low = 0x0000,
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.base_mid = 0x00,
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.access = 0b10010010,
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.granularity = 0b11001111,
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.base_hi = 0x00
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}
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};
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struct gdtr linux_gdt = {
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sizeof(linux_gdt_descs) - 1,
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(uintptr_t)linux_gdt_descs,
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#if defined (bios)
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0
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#endif
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};
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asm volatile (
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"lgdt %0\n\t"
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"push 0x10\n\t"
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"call 1f\n\t"
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"1:\n\t"
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"add dword ptr [esp], 5\n\t"
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"retf\n\t"
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"mov eax, 0x18\n\t"
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"mov ds, eax\n\t"
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"mov es, eax\n\t"
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"mov fs, eax\n\t"
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"mov gs, eax\n\t"
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"mov ss, eax\n\t"
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"xor ebp, ebp\n\t"
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"xor edi, edi\n\t"
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"xor ebx, ebx\n\t"
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"jmp ecx\n\t"
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:
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: "m"(linux_gdt), "c"(entry), "S"(boot_params)
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: "memory"
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);
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__builtin_unreachable();
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}
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@ -1,5 +1,3 @@
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#if defined (bios)
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#include <stdint.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <stddef.h>
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#include <protos/linux.h>
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#include <protos/linux.h>
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@ -14,57 +12,313 @@
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#include <mm/pmm.h>
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#include <mm/pmm.h>
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#include <mm/mtrr.h>
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#include <mm/mtrr.h>
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#include <sys/idt.h>
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#include <sys/idt.h>
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#include <lib/fb.h>
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#include <lib/acpi.h>
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#define KERNEL_LOAD_ADDR ((size_t)0x100000)
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__attribute__((noreturn)) void linux_spinup(void *entry, void *boot_params);
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#define KERNEL_HEAP_SIZE ((size_t)0x6000)
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__attribute__((noinline))
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// The following definitions and struct were copied and adapted from Linux
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__attribute__((section(".realmode")))
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// kernel headers released under GPL-2.0 WITH Linux-syscall-note
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static void spinup(uint16_t real_mode_code_seg, uint16_t kernel_entry_seg,
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// allowing their inclusion in non GPL compliant code.
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uint16_t stack_pointer) {
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struct idtr real_mode_idt = { 0x3ff, 0x0 };
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asm volatile (
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#define EDD_MBR_SIG_MAX 16
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"cli\n\t"
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#define E820_MAX_ENTRIES_ZEROPAGE 128
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"cld\n\t"
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#define EDDMAXNR 6
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"lidt [eax]\n\t"
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struct setup_header {
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uint8_t setup_sects;
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uint16_t root_flags;
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uint32_t syssize;
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uint16_t ram_size;
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uint16_t vid_mode;
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uint16_t root_dev;
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uint16_t boot_flag;
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uint16_t jump;
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uint32_t header;
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uint16_t version;
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uint32_t realmode_swtch;
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uint16_t start_sys_seg;
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uint16_t kernel_version;
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uint8_t type_of_loader;
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uint8_t loadflags;
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uint16_t setup_move_size;
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uint32_t code32_start;
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uint32_t ramdisk_image;
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uint32_t ramdisk_size;
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uint32_t bootsect_kludge;
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uint16_t heap_end_ptr;
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uint8_t ext_loader_ver;
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uint8_t ext_loader_type;
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uint32_t cmd_line_ptr;
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uint32_t initrd_addr_max;
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uint32_t kernel_alignment;
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uint8_t relocatable_kernel;
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uint8_t min_alignment;
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uint16_t xloadflags;
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uint32_t cmdline_size;
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uint32_t hardware_subarch;
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uint64_t hardware_subarch_data;
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uint32_t payload_offset;
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uint32_t payload_length;
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uint64_t setup_data;
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uint64_t pref_address;
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uint32_t init_size;
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uint32_t handover_offset;
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uint32_t kernel_info_offset;
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} __attribute__((packed));
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"jmp 0x08:1f\n\t"
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struct screen_info {
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"1: .code16\n\t"
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uint8_t orig_x; /* 0x00 */
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"mov ax, 0x10\n\t"
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uint8_t orig_y; /* 0x01 */
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"mov ds, ax\n\t"
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uint16_t ext_mem_k; /* 0x02 */
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"mov es, ax\n\t"
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uint16_t orig_video_page; /* 0x04 */
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"mov fs, ax\n\t"
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uint8_t orig_video_mode; /* 0x06 */
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"mov gs, ax\n\t"
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uint8_t orig_video_cols; /* 0x07 */
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"mov ss, ax\n\t"
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uint8_t flags; /* 0x08 */
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"mov eax, cr0\n\t"
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uint8_t unused2; /* 0x09 */
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"and al, 0xfe\n\t"
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uint16_t orig_video_ega_bx;/* 0x0a */
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"mov cr0, eax\n\t"
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uint16_t unused3; /* 0x0c */
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"mov eax, OFFSET 1f\n\t"
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uint8_t orig_video_lines; /* 0x0e */
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"push 0\n\t"
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uint8_t orig_video_isVGA; /* 0x0f */
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"push ax\n\t"
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uint16_t orig_video_points;/* 0x10 */
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"retf\n\t"
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"1:\n\t"
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"mov ds, bx\n\t"
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"mov es, bx\n\t"
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"mov fs, bx\n\t"
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"mov gs, bx\n\t"
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"mov ss, bx\n\t"
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"mov esp, edx\n\t"
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"push cx\n\t"
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/* VESA graphic mode -- linear frame buffer */
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"push 0\n\t"
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uint16_t lfb_width; /* 0x12 */
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uint16_t lfb_height; /* 0x14 */
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uint16_t lfb_depth; /* 0x16 */
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uint32_t lfb_base; /* 0x18 */
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uint32_t lfb_size; /* 0x1c */
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uint16_t cl_magic, cl_offset; /* 0x20 */
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uint16_t lfb_linelength; /* 0x24 */
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uint8_t red_size; /* 0x26 */
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uint8_t red_pos; /* 0x27 */
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uint8_t green_size; /* 0x28 */
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uint8_t green_pos; /* 0x29 */
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uint8_t blue_size; /* 0x2a */
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uint8_t blue_pos; /* 0x2b */
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uint8_t rsvd_size; /* 0x2c */
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uint8_t rsvd_pos; /* 0x2d */
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uint16_t vesapm_seg; /* 0x2e */
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uint16_t vesapm_off; /* 0x30 */
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uint16_t pages; /* 0x32 */
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uint16_t vesa_attributes; /* 0x34 */
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uint32_t capabilities; /* 0x36 */
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uint32_t ext_lfb_base; /* 0x3a */
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uint8_t _reserved[2]; /* 0x3e */
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} __attribute__((packed));
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"retf\n\t"
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struct apm_bios_info {
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uint16_t version;
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uint16_t cseg;
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uint32_t offset;
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uint16_t cseg_16;
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uint16_t dseg;
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uint16_t flags;
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uint16_t cseg_len;
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uint16_t cseg_16_len;
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uint16_t dseg_len;
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};
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".code32\n\t"
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struct ist_info {
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:
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uint32_t signature;
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: "a" (&real_mode_idt), "b" (real_mode_code_seg), "c" (kernel_entry_seg),
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uint32_t command;
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"d" (stack_pointer)
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uint32_t event;
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: "memory"
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uint32_t perf_level;
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);
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};
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}
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struct sys_desc_table {
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uint16_t length;
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uint8_t table[14];
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};
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||||||
|
struct olpc_ofw_header {
|
||||||
|
uint32_t ofw_magic; /* OFW signature */
|
||||||
|
uint32_t ofw_version;
|
||||||
|
uint32_t cif_handler; /* callback into OFW */
|
||||||
|
uint32_t irq_desc_table;
|
||||||
|
} __attribute__((packed));
|
||||||
|
|
||||||
|
struct edid_info {
|
||||||
|
unsigned char dummy[128];
|
||||||
|
};
|
||||||
|
|
||||||
|
struct efi_info {
|
||||||
|
uint32_t efi_loader_signature;
|
||||||
|
uint32_t efi_systab;
|
||||||
|
uint32_t efi_memdesc_size;
|
||||||
|
uint32_t efi_memdesc_version;
|
||||||
|
uint32_t efi_memmap;
|
||||||
|
uint32_t efi_memmap_size;
|
||||||
|
uint32_t efi_systab_hi;
|
||||||
|
uint32_t efi_memmap_hi;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct boot_e820_entry {
|
||||||
|
uint64_t addr;
|
||||||
|
uint64_t size;
|
||||||
|
uint32_t type;
|
||||||
|
} __attribute__((packed));
|
||||||
|
|
||||||
|
struct edd_device_params {
|
||||||
|
uint16_t length;
|
||||||
|
uint16_t info_flags;
|
||||||
|
uint32_t num_default_cylinders;
|
||||||
|
uint32_t num_default_heads;
|
||||||
|
uint32_t sectors_per_track;
|
||||||
|
uint64_t number_of_sectors;
|
||||||
|
uint16_t bytes_per_sector;
|
||||||
|
uint32_t dpte_ptr; /* 0xFFFFFFFF for our purposes */
|
||||||
|
uint16_t key; /* = 0xBEDD */
|
||||||
|
uint8_t device_path_info_length; /* = 44 */
|
||||||
|
uint8_t reserved2;
|
||||||
|
uint16_t reserved3;
|
||||||
|
uint8_t host_bus_type[4];
|
||||||
|
uint8_t interface_type[8];
|
||||||
|
union {
|
||||||
|
struct {
|
||||||
|
uint16_t base_address;
|
||||||
|
uint16_t reserved1;
|
||||||
|
uint32_t reserved2;
|
||||||
|
} __attribute__ ((packed)) isa;
|
||||||
|
struct {
|
||||||
|
uint8_t bus;
|
||||||
|
uint8_t slot;
|
||||||
|
uint8_t function;
|
||||||
|
uint8_t channel;
|
||||||
|
uint32_t reserved;
|
||||||
|
} __attribute__ ((packed)) pci;
|
||||||
|
/* pcix is same as pci */
|
||||||
|
struct {
|
||||||
|
uint64_t reserved;
|
||||||
|
} __attribute__ ((packed)) ibnd;
|
||||||
|
struct {
|
||||||
|
uint64_t reserved;
|
||||||
|
} __attribute__ ((packed)) xprs;
|
||||||
|
struct {
|
||||||
|
uint64_t reserved;
|
||||||
|
} __attribute__ ((packed)) htpt;
|
||||||
|
struct {
|
||||||
|
uint64_t reserved;
|
||||||
|
} __attribute__ ((packed)) unknown;
|
||||||
|
} interface_path;
|
||||||
|
union {
|
||||||
|
struct {
|
||||||
|
uint8_t device;
|
||||||
|
uint8_t reserved1;
|
||||||
|
uint16_t reserved2;
|
||||||
|
uint32_t reserved3;
|
||||||
|
uint64_t reserved4;
|
||||||
|
} __attribute__ ((packed)) ata;
|
||||||
|
struct {
|
||||||
|
uint8_t device;
|
||||||
|
uint8_t lun;
|
||||||
|
uint8_t reserved1;
|
||||||
|
uint8_t reserved2;
|
||||||
|
uint32_t reserved3;
|
||||||
|
uint64_t reserved4;
|
||||||
|
} __attribute__ ((packed)) atapi;
|
||||||
|
struct {
|
||||||
|
uint16_t id;
|
||||||
|
uint64_t lun;
|
||||||
|
uint16_t reserved1;
|
||||||
|
uint32_t reserved2;
|
||||||
|
} __attribute__ ((packed)) scsi;
|
||||||
|
struct {
|
||||||
|
uint64_t serial_number;
|
||||||
|
uint64_t reserved;
|
||||||
|
} __attribute__ ((packed)) usb;
|
||||||
|
struct {
|
||||||
|
uint64_t eui;
|
||||||
|
uint64_t reserved;
|
||||||
|
} __attribute__ ((packed)) i1394;
|
||||||
|
struct {
|
||||||
|
uint64_t wwid;
|
||||||
|
uint64_t lun;
|
||||||
|
} __attribute__ ((packed)) fibre;
|
||||||
|
struct {
|
||||||
|
uint64_t identity_tag;
|
||||||
|
uint64_t reserved;
|
||||||
|
} __attribute__ ((packed)) i2o;
|
||||||
|
struct {
|
||||||
|
uint32_t array_number;
|
||||||
|
uint32_t reserved1;
|
||||||
|
uint64_t reserved2;
|
||||||
|
} __attribute__ ((packed)) raid;
|
||||||
|
struct {
|
||||||
|
uint8_t device;
|
||||||
|
uint8_t reserved1;
|
||||||
|
uint16_t reserved2;
|
||||||
|
uint32_t reserved3;
|
||||||
|
uint64_t reserved4;
|
||||||
|
} __attribute__ ((packed)) sata;
|
||||||
|
struct {
|
||||||
|
uint64_t reserved1;
|
||||||
|
uint64_t reserved2;
|
||||||
|
} __attribute__ ((packed)) unknown;
|
||||||
|
} device_path;
|
||||||
|
uint8_t reserved4;
|
||||||
|
uint8_t checksum;
|
||||||
|
} __attribute__ ((packed));
|
||||||
|
|
||||||
|
struct edd_info {
|
||||||
|
uint8_t device;
|
||||||
|
uint8_t version;
|
||||||
|
uint16_t interface_support;
|
||||||
|
uint16_t legacy_max_cylinder;
|
||||||
|
uint8_t legacy_max_head;
|
||||||
|
uint8_t legacy_sectors_per_track;
|
||||||
|
struct edd_device_params params;
|
||||||
|
} __attribute__ ((packed));
|
||||||
|
|
||||||
|
struct boot_params {
|
||||||
|
struct screen_info screen_info; /* 0x000 */
|
||||||
|
struct apm_bios_info apm_bios_info; /* 0x040 */
|
||||||
|
uint8_t _pad2[4]; /* 0x054 */
|
||||||
|
uint64_t tboot_addr; /* 0x058 */
|
||||||
|
struct ist_info ist_info; /* 0x060 */
|
||||||
|
uint64_t acpi_rsdp_addr; /* 0x070 */
|
||||||
|
uint8_t _pad3[8]; /* 0x078 */
|
||||||
|
uint8_t hd0_info[16]; /* obsolete! */ /* 0x080 */
|
||||||
|
uint8_t hd1_info[16]; /* obsolete! */ /* 0x090 */
|
||||||
|
struct sys_desc_table sys_desc_table; /* obsolete! */ /* 0x0a0 */
|
||||||
|
struct olpc_ofw_header olpc_ofw_header; /* 0x0b0 */
|
||||||
|
uint32_t ext_ramdisk_image; /* 0x0c0 */
|
||||||
|
uint32_t ext_ramdisk_size; /* 0x0c4 */
|
||||||
|
uint32_t ext_cmd_line_ptr; /* 0x0c8 */
|
||||||
|
uint8_t _pad4[116]; /* 0x0cc */
|
||||||
|
struct edid_info edid_info; /* 0x140 */
|
||||||
|
struct efi_info efi_info; /* 0x1c0 */
|
||||||
|
uint32_t alt_mem_k; /* 0x1e0 */
|
||||||
|
uint32_t scratch; /* Scratch field! */ /* 0x1e4 */
|
||||||
|
uint8_t e820_entries; /* 0x1e8 */
|
||||||
|
uint8_t eddbuf_entries; /* 0x1e9 */
|
||||||
|
uint8_t edd_mbr_sig_buf_entries; /* 0x1ea */
|
||||||
|
uint8_t kbd_status; /* 0x1eb */
|
||||||
|
uint8_t secure_boot; /* 0x1ec */
|
||||||
|
uint8_t _pad5[2]; /* 0x1ed */
|
||||||
|
/*
|
||||||
|
* The sentinel is set to a nonzero value (0xff) in header.S.
|
||||||
|
*
|
||||||
|
* A bootloader is supposed to only take setup_header and put
|
||||||
|
* it into a clean boot_params buffer. If it turns out that
|
||||||
|
* it is clumsy or too generous with the buffer, it most
|
||||||
|
* probably will pick up the sentinel variable too. The fact
|
||||||
|
* that this variable then is still 0xff will let kernel
|
||||||
|
* know that some variables in boot_params are invalid and
|
||||||
|
* kernel should zero out certain portions of boot_params.
|
||||||
|
*/
|
||||||
|
uint8_t sentinel; /* 0x1ef */
|
||||||
|
uint8_t _pad6[1]; /* 0x1f0 */
|
||||||
|
struct setup_header hdr; /* setup header */ /* 0x1f1 */
|
||||||
|
uint8_t _pad7[0x290-0x1f1-sizeof(struct setup_header)];
|
||||||
|
uint32_t edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
|
||||||
|
struct boot_e820_entry e820_table[E820_MAX_ENTRIES_ZEROPAGE]; /* 0x2d0 */
|
||||||
|
uint8_t _pad8[48]; /* 0xcd0 */
|
||||||
|
struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
|
||||||
|
uint8_t _pad9[276]; /* 0xeec */
|
||||||
|
} __attribute__((packed));
|
||||||
|
|
||||||
|
// End of Linux code
|
||||||
|
|
||||||
void linux_load(char *config, char *cmdline) {
|
void linux_load(char *config, char *cmdline) {
|
||||||
struct file_handle *kernel = ext_mem_alloc(sizeof(struct file_handle));
|
struct file_handle *kernel = ext_mem_alloc(sizeof(struct file_handle));
|
||||||
|
|
@ -94,61 +348,64 @@ void linux_load(char *config, char *cmdline) {
|
||||||
|
|
||||||
size_t real_mode_code_size = 512 + setup_code_size;
|
size_t real_mode_code_size = 512 + setup_code_size;
|
||||||
|
|
||||||
size_t real_mode_and_heap_size = 0x8000 + KERNEL_HEAP_SIZE;
|
struct boot_params *boot_params = ext_mem_alloc(sizeof(struct boot_params));
|
||||||
|
|
||||||
void *real_mode_code = conv_mem_alloc_aligned(0x10000, 0x1000);
|
struct setup_header *setup_header = &boot_params->hdr;
|
||||||
|
|
||||||
fread(kernel, real_mode_code, 0, real_mode_code_size);
|
size_t setup_header_end = ({
|
||||||
|
uint8_t x;
|
||||||
|
fread(kernel, &x, 0x201, 1);
|
||||||
|
0x202 + x;
|
||||||
|
});
|
||||||
|
|
||||||
uint16_t boot_protocol_ver;
|
fread(kernel, setup_header, 0x1f1, setup_header_end - 0x1f1);
|
||||||
boot_protocol_ver = *((uint16_t *)(real_mode_code + 0x206));
|
|
||||||
|
|
||||||
print("linux: Boot protocol: %u.%u\n",
|
print("linux: Boot protocol: %u.%u\n",
|
||||||
boot_protocol_ver >> 8, boot_protocol_ver & 0xff);
|
setup_header->version >> 8, setup_header->version & 0xff);
|
||||||
|
|
||||||
if (boot_protocol_ver < 0x203) {
|
if (setup_header->version < 0x203) {
|
||||||
panic("Linux protocols < 2.03 are not supported");
|
panic("Linux protocols < 2.03 are not supported");
|
||||||
}
|
}
|
||||||
|
|
||||||
size_t heap_end_ptr = real_mode_and_heap_size - 0x200;
|
setup_header->cmd_line_ptr = (uint32_t)(uintptr_t)cmdline;
|
||||||
*((uint16_t *)(real_mode_code + 0x224)) = (uint16_t)heap_end_ptr;
|
|
||||||
|
|
||||||
char *cmdline_reloc = real_mode_code + real_mode_and_heap_size;
|
|
||||||
strcpy(cmdline_reloc, cmdline);
|
|
||||||
|
|
||||||
// vid_mode. 0xffff means "normal"
|
// vid_mode. 0xffff means "normal"
|
||||||
*((uint16_t *)(real_mode_code + 0x1fa)) = 0xffff;
|
setup_header->vid_mode = 0xffff;
|
||||||
|
|
||||||
char *kernel_version;
|
char *kernel_version = ext_mem_alloc(128);
|
||||||
kernel_version = real_mode_code + *((uint16_t *)(real_mode_code + 0x20e)) + 0x200;
|
if (setup_header->kernel_version != 0) {
|
||||||
|
fread(kernel, kernel_version, setup_header->kernel_version + 0x200, 128);
|
||||||
if (kernel_version) {
|
|
||||||
print("linux: Kernel version: %s\n", kernel_version);
|
print("linux: Kernel version: %s\n", kernel_version);
|
||||||
}
|
}
|
||||||
|
|
||||||
// set type of loader
|
setup_header->type_of_loader = 0xff;
|
||||||
*((uint8_t *)(real_mode_code + 0x210)) = 0xff;
|
|
||||||
|
|
||||||
uint8_t loadflags;
|
if (!(setup_header->loadflags & (1 << 0))) {
|
||||||
loadflags = *((uint8_t *)(real_mode_code + 0x211));
|
|
||||||
|
|
||||||
if (!(loadflags & (1 << 0))) {
|
|
||||||
panic("Linux kernels that load at 0x10000 are not supported");
|
panic("Linux kernels that load at 0x10000 are not supported");
|
||||||
}
|
}
|
||||||
|
|
||||||
loadflags &= ~(1 << 5); // print early messages
|
setup_header->loadflags &= ~(1 << 5); // print early messages
|
||||||
loadflags |= (1 << 7); // can use heap
|
|
||||||
|
|
||||||
*((uint8_t *)(real_mode_code + 0x211)) = loadflags;
|
|
||||||
|
|
||||||
*((uint32_t *)(real_mode_code + 0x228)) = (uint32_t)cmdline_reloc;
|
|
||||||
|
|
||||||
// load kernel
|
// load kernel
|
||||||
|
uintptr_t kernel_load_addr = 0x100000;
|
||||||
print("linux: Loading kernel...\n");
|
print("linux: Loading kernel...\n");
|
||||||
memmap_alloc_range(KERNEL_LOAD_ADDR, kernel->size - real_mode_code_size, 0, true, true);
|
for (;;) {
|
||||||
fread(kernel, (void *)KERNEL_LOAD_ADDR, real_mode_code_size, kernel->size - real_mode_code_size);
|
if (memmap_alloc_range(kernel_load_addr,
|
||||||
|
kernel->size - real_mode_code_size,
|
||||||
|
MEMMAP_BOOTLOADER_RECLAIMABLE, true, false))
|
||||||
|
break;
|
||||||
|
|
||||||
uint32_t modules_mem_base = *((uint32_t *)(real_mode_code + 0x22c)) + 1;
|
kernel_load_addr += 0x100000;
|
||||||
|
}
|
||||||
|
fread(kernel, (void *)kernel_load_addr, real_mode_code_size, kernel->size - real_mode_code_size);
|
||||||
|
|
||||||
|
print("linux: Kernel loaded at %x\n", kernel_load_addr);
|
||||||
|
|
||||||
|
///////////////////////////////////////
|
||||||
|
// Modules
|
||||||
|
///////////////////////////////////////
|
||||||
|
|
||||||
|
uint32_t modules_mem_base = setup_header->initrd_addr_max;
|
||||||
if (modules_mem_base == 0)
|
if (modules_mem_base == 0)
|
||||||
modules_mem_base = 0x38000000;
|
modules_mem_base = 0x38000000;
|
||||||
|
|
||||||
|
|
@ -170,7 +427,8 @@ void linux_load(char *config, char *cmdline) {
|
||||||
modules_mem_base = ALIGN_DOWN(modules_mem_base, 4096);
|
modules_mem_base = ALIGN_DOWN(modules_mem_base, 4096);
|
||||||
|
|
||||||
for (;;) {
|
for (;;) {
|
||||||
if (memmap_alloc_range(modules_mem_base, size_of_all_modules, 0, true, false))
|
if (memmap_alloc_range(modules_mem_base, size_of_all_modules,
|
||||||
|
MEMMAP_BOOTLOADER_RECLAIMABLE, true, false))
|
||||||
break;
|
break;
|
||||||
modules_mem_base -= 4096;
|
modules_mem_base -= 4096;
|
||||||
}
|
}
|
||||||
|
|
@ -193,18 +451,95 @@ void linux_load(char *config, char *cmdline) {
|
||||||
}
|
}
|
||||||
|
|
||||||
if (size_of_all_modules != 0) {
|
if (size_of_all_modules != 0) {
|
||||||
*((uint32_t *)(real_mode_code + 0x218)) = (uint32_t)modules_mem_base;
|
setup_header->ramdisk_image = (uint32_t)modules_mem_base;
|
||||||
*((uint32_t *)(real_mode_code + 0x21c)) = (uint32_t)size_of_all_modules;
|
setup_header->ramdisk_size = (uint32_t)size_of_all_modules;
|
||||||
}
|
}
|
||||||
|
|
||||||
uint16_t real_mode_code_seg = rm_seg(real_mode_code);
|
///////////////////////////////////////
|
||||||
uint16_t kernel_entry_seg = real_mode_code_seg + 0x20;
|
// Video
|
||||||
|
///////////////////////////////////////
|
||||||
|
|
||||||
term_deinit();
|
term_deinit();
|
||||||
|
|
||||||
mtrr_restore();
|
mtrr_restore();
|
||||||
|
|
||||||
spinup(real_mode_code_seg, kernel_entry_seg, real_mode_and_heap_size);
|
struct screen_info *screen_info = &boot_params->screen_info;
|
||||||
}
|
|
||||||
|
|
||||||
|
int req_width = 0, req_height = 0, req_bpp = 0;
|
||||||
|
|
||||||
|
char *resolution = config_get_value(config, 0, "RESOLUTION");
|
||||||
|
if (resolution != NULL)
|
||||||
|
parse_resolution(&req_width, &req_height, &req_bpp, resolution);
|
||||||
|
|
||||||
|
struct fb_info fbinfo;
|
||||||
|
if (!fb_init(&fbinfo, req_width, req_height, req_bpp))
|
||||||
|
panic("linux: Unable to set video mode");
|
||||||
|
|
||||||
|
screen_info->lfb_base = fbinfo.framebuffer_addr;
|
||||||
|
screen_info->lfb_size = fbinfo.framebuffer_pitch * fbinfo.framebuffer_height;
|
||||||
|
screen_info->lfb_width = fbinfo.framebuffer_width;
|
||||||
|
screen_info->lfb_height = fbinfo.framebuffer_height;
|
||||||
|
screen_info->lfb_depth = fbinfo.framebuffer_bpp;
|
||||||
|
screen_info->lfb_linelength = fbinfo.framebuffer_pitch;
|
||||||
|
screen_info->red_size = fbinfo.red_mask_size;
|
||||||
|
screen_info->red_pos = fbinfo.red_mask_shift;
|
||||||
|
screen_info->green_size = fbinfo.green_mask_size;
|
||||||
|
screen_info->green_pos = fbinfo.green_mask_shift;
|
||||||
|
screen_info->blue_size = fbinfo.blue_mask_size;
|
||||||
|
screen_info->blue_pos = fbinfo.blue_mask_shift;
|
||||||
|
|
||||||
|
screen_info->orig_video_isVGA = 0x23;
|
||||||
|
|
||||||
|
///////////////////////////////////////
|
||||||
|
// RSDP
|
||||||
|
///////////////////////////////////////
|
||||||
|
|
||||||
|
boot_params->acpi_rsdp_addr = (uintptr_t)acpi_get_rsdp();
|
||||||
|
|
||||||
|
///////////////////////////////////////
|
||||||
|
// Jettison UEFI
|
||||||
|
///////////////////////////////////////
|
||||||
|
#if defined (uefi)
|
||||||
|
efi_exit_boot_services();
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
///////////////////////////////////////
|
||||||
|
// e820
|
||||||
|
///////////////////////////////////////
|
||||||
|
|
||||||
|
struct boot_e820_entry *e820_table = boot_params->e820_table;
|
||||||
|
|
||||||
|
size_t memmap_entries;
|
||||||
|
struct e820_entry_t *memmap = get_memmap(&memmap_entries);
|
||||||
|
|
||||||
|
boot_params->e820_entries = memmap_entries + 1;
|
||||||
|
|
||||||
|
e820_table[0].addr = bump_allocator_base;
|
||||||
|
e820_table[0].size = bump_allocator_limit - bump_allocator_base;
|
||||||
|
e820_table[0].type = MEMMAP_USABLE;
|
||||||
|
|
||||||
|
for (size_t i = 1; i < memmap_entries + 1; i++) {
|
||||||
|
e820_table[i].addr = memmap[i-1].base;
|
||||||
|
e820_table[i].size = memmap[i-1].length;
|
||||||
|
e820_table[i].type = memmap[i-1].type;
|
||||||
|
|
||||||
|
switch (e820_table[i].type) {
|
||||||
|
case MEMMAP_BOOTLOADER_RECLAIMABLE:
|
||||||
|
case MEMMAP_EFI_RECLAIMABLE:
|
||||||
|
e820_table[i].type = MEMMAP_USABLE;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
///////////////////////////////////////
|
||||||
|
// Spin up
|
||||||
|
///////////////////////////////////////
|
||||||
|
|
||||||
|
#if defined (uefi)
|
||||||
|
do_32(linux_spinup, 2, (void *)kernel_load_addr, boot_params);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined (bios)
|
||||||
|
linux_spinup((void *)kernel_load_addr, boot_params);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
|
||||||
|
|
@ -283,13 +283,6 @@ __attribute__((noreturn)) void stivale_spinup(
|
||||||
pic_flush();
|
pic_flush();
|
||||||
|
|
||||||
#if defined (uefi)
|
#if defined (uefi)
|
||||||
asm volatile (
|
|
||||||
"lgdt %0\n\t"
|
|
||||||
:
|
|
||||||
: "m"(gdt)
|
|
||||||
: "memory"
|
|
||||||
);
|
|
||||||
|
|
||||||
do_32(stivale_spinup_32, 8,
|
do_32(stivale_spinup_32, 8,
|
||||||
bits, level5pg, (uint32_t)(uintptr_t)pagemap->top_level,
|
bits, level5pg, (uint32_t)(uintptr_t)pagemap->top_level,
|
||||||
(uint32_t)entry_point, (uint32_t)(entry_point >> 32),
|
(uint32_t)entry_point, (uint32_t)(entry_point >> 32),
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue