mirror of
https://github.com/AsahiLinux/m1n1
synced 2024-12-12 15:42:27 +00:00
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/* SPDX-License-Identifier: MIT */
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#include "chickens.h"
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#include "exception.h"
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#include "string.h"
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#include "types.h"
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#include "uart.h"
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#include "utils.h"
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#include "xnuboot.h"
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u64 boot_args_addr;
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struct boot_args cur_boot_args;
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void *adt;
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struct rela_entry {
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uint64_t off, type, addend;
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};
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void debug_putc(char c);
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void m1n1_main(void);
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#define R_AARCH64_RELATIVE 1027
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void apply_rela(uint64_t base, struct rela_entry *rela_start,
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struct rela_entry *rela_end)
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{
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struct rela_entry *e = rela_start;
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while (e < rela_end) {
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switch (e->type) {
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case R_AARCH64_RELATIVE:
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*(u64 *)(base + e->off) = base + e->addend;
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break;
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default:
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debug_putc('R');
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debug_putc('!');
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while (1)
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;
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}
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e++;
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}
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}
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void dump_boot_args(struct boot_args *ba)
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{
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printf(" revision: %d\n", ba->revision);
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printf(" version: %d\n", ba->version);
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printf(" virt_base: 0x%lx\n", ba->virt_base);
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printf(" phys_base: 0x%lx\n", ba->phys_base);
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printf(" mem_size: 0x%lx\n", ba->mem_size);
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printf(" top_of_kdata: 0x%lx\n", ba->top_of_kernel_data);
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printf(" video:\n");
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printf(" base: 0x%lx\n", ba->video.base);
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printf(" display: 0x%lx\n", ba->video.display);
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printf(" stride: 0x%lx\n", ba->video.stride);
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printf(" width: %d\n", ba->video.width);
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printf(" height: %d\n", ba->video.height);
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printf(" depth: 0x%lx\n", ba->video.depth);
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printf(" machine_type: %d\n", ba->machine_type);
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printf(" devtree: %p\n", ba->devtree);
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printf(" devtree_size: 0x%x\n", ba->devtree_size);
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printf(" cmdline: %s\n", ba->cmdline);
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printf(" boot_flags: 0x%x\n", ba->boot_flags);
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printf(" mem_size_act: 0x%lx\n", ba->mem_size_actual);
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}
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void _start_c(void *boot_args, void *base)
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{
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uart_putchar('s');
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uart_init();
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uart_putchar('c');
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uart_puts(": Initializing");
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printf("CPU init... ");
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const char *type = init_cpu();
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printf("CPU: %s\n\n", type);
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printf("boot_args at %p\n", boot_args);
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boot_args_addr = (u64)boot_args;
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memcpy(&cur_boot_args, boot_args, sizeof(cur_boot_args));
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dump_boot_args(&cur_boot_args);
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printf("\n");
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adt = (void *)(((u64)cur_boot_args.devtree) - cur_boot_args.virt_base +
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cur_boot_args.phys_base);
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exception_initialize();
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m1n1_main();
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}
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