206 lines
8.4 KiB
C
206 lines
8.4 KiB
C
#include <stivale2.h>
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#include <stdint.h>
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#include <e9print.h>
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#include <stddef.h>
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typedef uint8_t stack[4096];
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static stack stacks[10] = {0};
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void stivale2_main(struct stivale2_struct *info);
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struct stivale2_header_tag_terminal terminal_request = {
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.tag = {
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.identifier = STIVALE2_HEADER_TAG_TERMINAL_ID,
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.next = 0
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},
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.flags = 0
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};
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struct stivale2_header_tag_smp smp_request = {
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.tag = {
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.identifier = STIVALE2_HEADER_TAG_SMP_ID,
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.next = (uint64_t)&terminal_request
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},
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.flags = 0
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};
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struct stivale2_tag fb_mtrr_request = {
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.identifier = STIVALE2_HEADER_TAG_FB_MTRR_ID,
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.next = (uint64_t)&smp_request
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};
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struct stivale2_header_tag_framebuffer framebuffer_request = {
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.tag = {
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.identifier = STIVALE2_HEADER_TAG_FRAMEBUFFER_ID,
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.next = (uint64_t)&fb_mtrr_request
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},
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.framebuffer_width = 0,
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.framebuffer_height = 0,
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.framebuffer_bpp = 0,
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};
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__attribute__((section(".stivale2hdr"), used))
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struct stivale2_header header2 = {
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.entry_point = (uint64_t)stivale2_main,
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.stack = (uintptr_t)stacks[0] + sizeof(stack),
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.flags = 0,
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.tags = (uint64_t)&framebuffer_request
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};
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static volatile int cpu_up = 0;
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static void ap_entry(struct stivale2_smp_info *s) {
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e9_printf(" AP %d started", s->lapic_id);
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cpu_up = 1;
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for (;;) asm("hlt");
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}
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void stivale2_main(struct stivale2_struct *info) {
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// Print the tags.
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struct stivale2_tag *tag = (struct stivale2_tag *)info->tags;
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while (tag != NULL) {
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if (tag->identifier == STIVALE2_STRUCT_TAG_TERMINAL_ID) {
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struct stivale2_struct_tag_terminal *t = (void *)tag;
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stivale2_print = (void *)(uintptr_t)t->term_write;
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}
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tag = (void *)tag->next;
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}
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// Print stuff.
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e9_puts("Stivale2 info passed to the kernel:");
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e9_printf("Bootloader brand: %s", info->bootloader_brand);
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e9_printf("Bootloader version: %s", info->bootloader_version);
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// Print the tags.
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tag = (struct stivale2_tag *)info->tags;
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while (tag != NULL) {
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switch (tag->identifier) {
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case STIVALE2_STRUCT_TAG_CMDLINE_ID: {
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struct stivale2_struct_tag_cmdline *c = (struct stivale2_struct_tag_cmdline *)tag;
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e9_puts("Commandline tag:");
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e9_printf(" Cmdline: %s", (char*)(c->cmdline));
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break;
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}
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case STIVALE2_STRUCT_TAG_MEMMAP_ID: {
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struct stivale2_struct_tag_memmap *m = (struct stivale2_struct_tag_memmap *)tag;
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e9_puts("Memmap tag:");
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e9_printf(" Entries: %d", m->entries);
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for (size_t i = 0; i < m->entries; i++) {
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struct stivale2_mmap_entry me = m->memmap[i];
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e9_printf(" [%x+%x] %x", me.base, me.length, me.type);
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}
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break;
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}
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case STIVALE2_STRUCT_TAG_FRAMEBUFFER_ID: {
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struct stivale2_struct_tag_framebuffer *f = (struct stivale2_struct_tag_framebuffer *)tag;
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e9_puts("Framebuffer tag:");
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e9_printf(" Address: %x", f->framebuffer_addr);
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e9_printf(" Width: %d", f->framebuffer_width);
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e9_printf(" Height: %d", f->framebuffer_height);
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e9_printf(" Pitch: %d", f->framebuffer_pitch);
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e9_printf(" BPP: %d", f->framebuffer_bpp);
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e9_printf(" Memory model: %d", f->memory_model);
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e9_printf(" Red mask size: %d", f->red_mask_size);
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e9_printf(" Red mask size: %d", f->red_mask_shift);
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e9_printf(" Green mask size: %d", f->green_mask_size);
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e9_printf(" Green mask size: %d", f->green_mask_shift);
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e9_printf(" Blue mask size: %d", f->blue_mask_size);
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e9_printf(" Blue mask size: %d", f->blue_mask_shift);
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break;
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}
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case STIVALE2_STRUCT_TAG_EDID_ID: {
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struct stivale2_struct_tag_edid *edid = (struct stivale2_struct_tag_edid *)tag;
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e9_printf("EDID information at %x:", edid->edid_information);
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e9_printf(" Size: %d", edid->edid_size);
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break;
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}
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case STIVALE2_STRUCT_TAG_FB_MTRR_ID: {
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e9_puts("Framebuffer WC MTRR tag:");
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e9_puts(" Framebuffer WC MTRR enabled");
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break;
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}
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case STIVALE2_STRUCT_TAG_TERMINAL_ID: {
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struct stivale2_struct_tag_terminal *term = (struct stivale2_struct_tag_terminal *)tag;
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e9_puts("Terminal tag:");
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e9_printf(" Terminal write entry point at: %x", term->term_write);
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break;
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}
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case STIVALE2_STRUCT_TAG_MODULES_ID: {
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struct stivale2_struct_tag_modules *m = (struct stivale2_struct_tag_modules *)tag;
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e9_puts("Modules tag:");
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e9_printf(" Count: %d", m->module_count);
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for (size_t i = 0; i < m->module_count; i++) {
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struct stivale2_module me = m->modules[i];
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e9_printf(" [%x+%x] %s", me.begin, me.end, me.string);
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}
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break;
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}
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case STIVALE2_STRUCT_TAG_RSDP_ID: {
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struct stivale2_struct_tag_rsdp *r = (struct stivale2_struct_tag_rsdp *)tag;
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e9_puts("RSDP tag:");
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e9_printf(" RSDP: %x", r->rsdp);
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break;
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}
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case STIVALE2_STRUCT_TAG_EPOCH_ID: {
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struct stivale2_struct_tag_epoch *e = (struct stivale2_struct_tag_epoch *)tag;
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e9_puts("Epoch tag:");
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e9_printf(" Epoch: %x", e->epoch);
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break;
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}
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case STIVALE2_STRUCT_TAG_FIRMWARE_ID: {
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struct stivale2_struct_tag_firmware *f = (struct stivale2_struct_tag_firmware *)tag;
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e9_puts("Firmware tag:");
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e9_printf(" Flags: %x", f->flags);
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break;
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}
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case STIVALE2_STRUCT_TAG_EFI_SYSTEM_TABLE_ID: {
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struct stivale2_struct_tag_efi_system_table *t = (struct stivale2_struct_tag_efi_system_table *)tag;
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e9_printf("EFI system table at: %x", t->system_table);
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break;
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}
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case STIVALE2_STRUCT_TAG_KERNEL_FILE_ID: {
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struct stivale2_struct_tag_kernel_file *t = (struct stivale2_struct_tag_kernel_file *)tag;
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e9_printf("Raw kernel file loaded at: %x", t->kernel_file);
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break;
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}
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case STIVALE2_STRUCT_TAG_KERNEL_SLIDE_ID: {
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struct stivale2_struct_tag_kernel_slide *t = (struct stivale2_struct_tag_kernel_slide *)tag;
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e9_printf("Kernel slide: %x", t->kernel_slide);
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break;
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}
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case STIVALE2_STRUCT_TAG_SMP_ID: {
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struct stivale2_struct_tag_smp *s = (struct stivale2_struct_tag_smp *)tag;
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e9_puts("SMP tag:");
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e9_printf(" Flags: %x", s->flags);
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e9_printf(" BSP LAPIC ID: %d", s->bsp_lapic_id);
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e9_printf(" CPU Count: %d", s->cpu_count);
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for (size_t i = 0; i < s->cpu_count; i++) {
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struct stivale2_smp_info *in = &s->smp_info[i];
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e9_printf(" Processor ID: %d", in->processor_id);
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e9_printf(" LAPIC ID: %d", in->lapic_id);
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e9_printf(" Target Stack: %x", in->target_stack);
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e9_printf(" GOTO Address: %x", in->goto_address);
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e9_printf(" Extra Argument: %x", in->extra_argument);
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if (in->lapic_id != s->bsp_lapic_id) {
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in->target_stack = (uintptr_t)stacks[in->lapic_id] + sizeof(stack);
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in->goto_address = (uintptr_t)ap_entry;
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while (cpu_up == 0);
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cpu_up = 0;
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}
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}
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break;
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}
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default:
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e9_printf("BUG: Unidentified tag %x", tag->identifier);
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}
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tag = (struct stivale2_tag *)tag->next;
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}
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// Enter our sublime pale slumber.
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for (;;) asm("hlt");
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}
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