mirror of
https://github.com/vivier/EMILE.git
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228 lines
5.8 KiB
C
228 lines
5.8 KiB
C
/*
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*
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* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
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*
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*/
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#include <stdio.h>
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#include <malloc.h>
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#include <string.h>
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#include "lowmem.h"
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#include "bank.h"
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#include "memory.h"
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#include "uncompress.h"
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#include "bootinfo.h"
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#include "console.h"
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#include "arch.h"
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#include "misc.h"
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#include "glue.h"
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#include "load.h"
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typedef void (*entry_t) (unsigned long , unsigned long , unsigned long );
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typedef void (*disable_cache_t) (void);
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extern void enter_kernel030(unsigned long addr, unsigned long size, unsigned long dest);
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extern char end_enter_kernel030;
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extern void MMU030_disable_cache(void);
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extern void enter_kernel040(unsigned long addr, unsigned long size, unsigned long dest);
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extern char end_enter_kernel040;
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extern void MMU040_disable_cache(void);
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define BI_ALLOC_SIZE (4096L) // Allocate 4K for bootinfo
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#define KERNEL_ALIGN (256L * 1024L) // Kernel alignment, on 256K boundary
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struct first_level_info {
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unsigned long kernel_image_offset;
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unsigned long kernel_image_size;
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unsigned long kernel_size;
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unsigned long ramdisk_offset;
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unsigned long ramdisk_size;
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char command_line[CL_SIZE];
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};
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int start(struct first_level_info* info)
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{
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char * kernel;
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unsigned long physImage;
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entry_t entry;
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disable_cache_t disable_cache;
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int ret;
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unsigned long start_mem;
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unsigned long aligned_size;
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unsigned long aligned_addr;
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unsigned long enter_kernel;
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unsigned long end_enter_kernel;
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unsigned long kernel_image_start;
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unsigned long ramdisk_start;
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int uncompressed_size;
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printf("Early Macintosh Image LoadEr\n");
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printf("EMILE v"VERSION" (c) 2004 Laurent Vivier\n");
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printf("This is free software, redistribute it under GPL\n");
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arch_init();
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init_memory_map();
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#ifdef BANK_DUMP
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bank_dump();
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#endif
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/* load kernel */
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printf("vmlinux %s\n", info->command_line);
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printf("Loading kernel...\n");
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kernel_image_start = (unsigned long)load_image(
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(unsigned long)info->kernel_image_offset,
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info->kernel_image_size);
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printf("Kernel image loaded at 0x%lx\n", kernel_image_start);
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printf("Kernel image size is %ld Bytes\n", info->kernel_image_size);
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/* where is mapped my boot function ? */
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if (mmu_type == gestalt68040MMU)
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{
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enter_kernel = (unsigned long)enter_kernel040;
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end_enter_kernel = (unsigned long)&end_enter_kernel040;
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disable_cache = MMU040_disable_cache;
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}
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else
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{
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enter_kernel = (unsigned long)enter_kernel030;
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end_enter_kernel = (unsigned long)&end_enter_kernel030;
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disable_cache = MMU030_disable_cache;
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}
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printf("Available Memory: %ld kB\n", bank_mem_avail() / 1024);
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if (info->kernel_image_size != 0)
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{
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if (info->kernel_size == 0)
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info->kernel_size = info->kernel_image_size * 3;
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/* add KERNEL_ALIGN if we have to align
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* and BI_ALLOC_SIZE for bootinfo
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*/
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printf("Allocating %ld bytes for kernel\n", info->kernel_size);
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kernel = (char*)malloc(info->kernel_size + 4 + BI_ALLOC_SIZE +
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end_enter_kernel - enter_kernel);
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if (kernel == 0)
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{
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printf("cannot allocate %ld bytes\n", info->kernel_size);
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while(1);
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}
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/* align kernel address to a 4 byte word */
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kernel = (unsigned char*)(((unsigned long)kernel + 3) & 0xFFFFFFFC);
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uncompressed_size = uncompress(kernel, (char*)kernel_image_start);
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printf("\n");
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if (check_full_in_bank((unsigned long)kernel, uncompressed_size))
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error("Kernel between two banks, send a mail to LaurentVivier@wanadoo.fr for support\n");
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/* copy enter_kernel at end of kernel */
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memcpy((char*)kernel_image_start + uncompressed_size
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+ BI_ALLOC_SIZE,
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(char*)enter_kernel, end_enter_kernel - enter_kernel);
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end_enter_kernel = kernel_image_start + uncompressed_size
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+ BI_ALLOC_SIZE +
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(end_enter_kernel - enter_kernel);
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enter_kernel = kernel_image_start + + BI_ALLOC_SIZE
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+ uncompressed_size;
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}
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else
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{
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error("Kernel is missing !!!!\n");
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}
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/* free kernel image */
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free((void*)kernel_image_start);
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/* load ramdisk if needed */
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if (info->ramdisk_size != 0)
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{
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printf("Loading RAMDISK...\n");
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ramdisk_start = (unsigned long)load_image(
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(unsigned long)info->ramdisk_offset,
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info->ramdisk_size);
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printf("RAMDISK loaded at 0x%lx\n", ramdisk_start);
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printf("RAMDISK size is %ld Bytes\n", info->ramdisk_size);
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if (check_full_in_bank(ramdisk_start, info->ramdisk_size))
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error("ramdisk between two banks, send a mail to LaurentVivier@wanadoo.fr for support\n");
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}
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else
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{
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ramdisk_start = 0;
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printf("no RAMDISK\n");
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}
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ret = logical2physical((unsigned long)kernel, &physImage);
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/* disable and flush cache */
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disable_cache();
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/* initialize bootinfo structure */
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bootinfo_init(info->command_line,
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(char*)ramdisk_start, info->ramdisk_size);
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/* compute final address of kernel */
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aligned_size = boot_info.memory[0].addr & (KERNEL_ALIGN - 1);
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if ( aligned_size > 0 )
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{
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aligned_size = KERNEL_ALIGN - aligned_size;
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aligned_addr = boot_info.memory[0].addr + aligned_size;
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aligned_size = boot_info.memory[0].size - aligned_size;
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boot_info.memory[0].addr = aligned_addr;
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boot_info.memory[0].size = aligned_size;
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}
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/* set bootinfo at end of kernel image */
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set_kernel_bootinfo(kernel + uncompressed_size);
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/* disable interrupt */
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asm("ori.w #0x0700,%sr");
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ret = logical2physical(enter_kernel, (unsigned long*)&entry);
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if ( (ret == 0) && (enter_kernel != (unsigned long)entry) )
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{
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unsigned long logi;
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unsigned long size = end_enter_kernel - enter_kernel;
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logi = console_get_video();
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ret = logical2physical(logi, (unsigned long*)&entry);
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memcpy((char*)logi, (char*)enter_kernel, size);
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memcpy((char*)entry, (char*)enter_kernel, size);
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}
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start_mem = boot_info.memory[0].addr + PAGE_SIZE;
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printf("\n");
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printf("Physical address of kernel will be 0x%08lx\n", start_mem);
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printf("Ok, booting the kernel.\n");
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/* kick off */
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entry(physImage, uncompressed_size + BI_ALLOC_SIZE, start_mem);
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return 0;
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}
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