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EMILE/second/main.c

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/*
*
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <unistd.h>
#include "lowmem.h"
#include "bank.h"
#include "memory.h"
#ifdef ARCH_M68K
#include "bootinfo.h"
#endif
#ifdef ARCH_PPC
#include "bootx.h"
#endif
#include "arch.h"
#include "misc.h"
#include "glue.h"
#include "load.h"
#include "console.h"
#include "vga.h"
#ifdef ARCH_M68K
typedef void (*entry_t) (unsigned long , unsigned long , unsigned long );
typedef void (*disable_cache_t) (void);
extern void enter_kernelnoMMU(unsigned long addr, unsigned long size, unsigned long dest);
extern char end_enter_kernelnoMMU;
extern void noMMU_disable_cache(void);
extern void enter_kernel030(unsigned long addr, unsigned long size, unsigned long dest);
extern char end_enter_kernel030;
extern void MMU030_disable_cache(void);
extern void enter_kernel040(unsigned long addr, unsigned long size, unsigned long dest);
extern char end_enter_kernel040;
extern void MMU040_disable_cache(void);
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define KERNEL_ALIGN (256L * 1024L) // Kernel alignment, on 256K boundary
#define BI_ALLOC_SIZE (4096L) // Allocate 4K for bootinfo
#endif
#ifdef ARCH_PPC
#include "enter_kernelPPC.h"
#endif
int start(emile_l2_header_t* info)
{
char * kernel;
#ifdef ARCH_M68K
unsigned long physical;
entry_t entry;
unsigned long physImage;
disable_cache_t disable_cache;
unsigned long aligned_size;
unsigned long aligned_addr;
unsigned long enter_kernel;
unsigned long end_enter_kernel;
unsigned long start_mem;
#endif
#ifdef ARCH_PPC
PPCRegisterList regs;
#endif
int ret;
unsigned long ramdisk_start;
int bootstrap_size;
printf("Early Macintosh Image LoadEr"
#if defined(ARCH_M68K) && defined(ARCH_PPC)
" (mixed mode)\n");
#elif defined(ARCH_M68K)
" for Motorola 680x0\n");
#elif defined(ARCH_PPC)
" for PowerPC\n");
#else
" (unknown processor)\n");
#endif
printf("EMILE v"VERSION" (c) 2004,2005 Laurent Vivier\n");
printf("This is free software, redistribute it under GPL\n");
if (!EMILE_COMPAT(EMILE_05_SIGNATURE, info->signature))
error("Bad header signature !\n");
arch_init();
init_memory_map();
#ifdef BANK_DUMP
bank_dump();
#endif
printf("Available Memory: %ld kB\n", bank_mem_avail() / 1024);
if (info->gestaltID != 0) {
machine_id = info->gestaltID;
printf("User forces gestalt ID to %ld\n", machine_id);
}
/* where is mapped my boot function ? */
#ifdef ARCH_M68K
if (arch_type == gestalt68k)
{
if (mmu_type == gestalt68040MMU)
{
printf("Using 68040 MMU\n");
enter_kernel = (unsigned long)enter_kernel040;
end_enter_kernel = (unsigned long)&end_enter_kernel040;
disable_cache = MMU040_disable_cache;
}
else if (mmu_type == gestalt68030MMU)
{
printf("Using 68030 MMU\n");
enter_kernel = (unsigned long)enter_kernel030;
end_enter_kernel = (unsigned long)&end_enter_kernel030;
disable_cache = MMU030_disable_cache;
}
else if (mmu_type == gestalt68851)
{
error("MMU 68851 is not supported");
}
else if (mmu_type == gestaltNoMMU)
{
printf("No MMU detected\n");
enter_kernel = (unsigned long)enter_kernelnoMMU;
end_enter_kernel = (unsigned long)&end_enter_kernelnoMMU;
disable_cache = noMMU_disable_cache;
}
else
error("Unknown MMU");
/* and BI_ALLOC_SIZE for bootinfo */
bootstrap_size = BI_ALLOC_SIZE +
end_enter_kernel - enter_kernel;
}
else
#ifndef ARCH_PPC
error("EMILE doesn't support your architecture");
#endif
#endif
#ifdef ARCH_PPC
if (arch_type == gestaltPowerPC)
{
enter_kernel = NULL;
end_enter_kernel = NULL;
disable_cache = NULL;
bootstrap_size = 0;
}
else
error("EMILE doesn't support your architecture");
#endif
/* load kernel */
if (info->kernel_image_size == 0)
error("Kernel is missing !!!!\n");
printf("vmlinux %s\n", info->command_line);
#ifdef SCSI_SUPPORT
info->kernel_image_offset = (unsigned long)info->kernel_image_offset + (unsigned long)info;
#endif
printf("Kernel image size is %d Bytes\n", info->kernel_image_size);
/* allocate memory for kernel */
printf("Allocating %d bytes for kernel\n", info->kernel_size);
kernel = (char*)malloc_contiguous(info->kernel_size + 4 +
bootstrap_size
);
if (kernel == 0)
{
printf("cannot allocate %d bytes\n", info->kernel_size);
while(1);
}
/* align kernel address to a 4 byte word */
kernel = (unsigned char*)(((unsigned long)kernel + 3) & 0xFFFFFFFC);
printf("Kernel image base at %p\n", kernel);
if (!check_full_in_bank((unsigned long)kernel, info->kernel_size))
error("Kernel between two banks, contact maintainer\n");
/* load kernel */
printf("Loading kernel...\n");
if (info->kernel_size == info->kernel_image_size) /* means uncompressed */
{
/* load kernel */
ret = load_image((unsigned long)info->kernel_image_offset,
info->kernel_size, kernel);
if (ret == -1)
error("Cannot load kernel image\n");
}
else
{
/* load and uncompress kernel */
ret = load_gzip((unsigned long)info->kernel_image_offset,
info->kernel_image_size, kernel);
if (ret == -1)
error("Cannot load and uncompress kernel image\n");
}
#ifdef ARCH_M68K
if (arch_type == gestalt68k)
{
/* copy enter_kernel at end of kernel */
memcpy((char*)kernel + info->kernel_size + BI_ALLOC_SIZE,
(char*)enter_kernel, end_enter_kernel - enter_kernel);
end_enter_kernel = (unsigned long)kernel + info->kernel_size
+ BI_ALLOC_SIZE + (end_enter_kernel - enter_kernel);
enter_kernel = (unsigned long)kernel + BI_ALLOC_SIZE
+ info->kernel_size;
}
#endif
/* load ramdisk if needed */
if (info->ramdisk_size != 0)
{
printf("RAMDISK size is %d Bytes\n", info->ramdisk_size);
ramdisk_start = (unsigned long)malloc_contiguous(
info->ramdisk_size + 4);
ramdisk_start = (ramdisk_start + 3) & 0xFFFFFFFC;
printf("RAMDISK base at 0x%lx\n", ramdisk_start);
printf("Loading RAMDISK...\n");
ret = load_image((unsigned long)info->ramdisk_offset,
info->ramdisk_size, (char*)ramdisk_start);
if (ret == -1)
error("Cannot load ramdisk\n");
if (!check_full_in_bank(ramdisk_start, info->ramdisk_size))
error("ramdisk between two banks, contact maintainer\n");
}
else
{
ramdisk_start = 0;
printf("no RAMDISK\n");
}
#ifdef ARCH_M68K
if (arch_type == gestalt68k)
{
/* initialize bootinfo structure */
bootinfo_init(info->command_line,
(char*)ramdisk_start, info->ramdisk_size);
/* set bootinfo at end of kernel image */
set_kernel_bootinfo(kernel + info->kernel_size);
/* compute final address of kernel */
if (mmu_type == gestaltNoMMU)
{
unsigned long size = end_enter_kernel - enter_kernel;
physImage = (unsigned long)kernel;
start_mem = KERNEL_BASEADDR + 0x1000;
entry = (entry_t)(start_mem - size);
printf("\n");
printf("Physical address of kernel will be 0x%08lx\n",
start_mem);
printf("Ok, booting the kernel.\n");
memcpy(entry, (char*)enter_kernel, size);
}
else
{
ret = logical2physical((unsigned long)kernel, &physImage);
/* disable and flush cache */
disable_cache();
/* add KERNEL_ALIGN if we have to align */
aligned_size = boot_info.memory[0].addr & (KERNEL_ALIGN - 1);
if ( aligned_size > 0 )
{
aligned_size = KERNEL_ALIGN - aligned_size;
aligned_addr = boot_info.memory[0].addr + aligned_size;
aligned_size = boot_info.memory[0].size - aligned_size;
boot_info.memory[0].addr = aligned_addr;
boot_info.memory[0].size = aligned_size;
}
start_mem = boot_info.memory[0].addr + PAGE_SIZE;
printf("\n");
printf("Physical address of kernel will be 0x%08lx\n",
start_mem);
printf("Ok, booting the kernel.\n");
ret = logical2physical(enter_kernel, &physical);
entry = (entry_t)physical;
if ( (ret == 0) && (enter_kernel != (unsigned long)entry) )
{
unsigned long logi;
unsigned long size = end_enter_kernel - enter_kernel;
logi = vga_get_video();
ret = logical2physical(logi, &physical);
entry = (entry_t)physical;
memcpy((char*)logi, (char*)enter_kernel, size);
memcpy((char*)entry, (char*)enter_kernel, size);
}
}
}
else
#ifndef ARCH_PPC
error("EMILE doesn't support your architecture");
#endif
#endif /* ARCH_M68K */
#ifdef ARCH_PPC
if (arch_type == gestaltPowerPC)
{
bootx_init(info->command_line,
(char*)ramdisk_start, info->ramdisk_size);
regs.PC = (u_int32_t)kernel;
#define BOOT_KERNEL_STACK_SIZE 65536
regs.GPR[1] = (u_int32_t)malloc_contiguous(BOOT_KERNEL_STACK_SIZE)
+ BOOT_KERNEL_STACK_SIZE - 512;
regs.GPR[2] = 0;
regs.GPR[3] = 'BooX';
regs.GPR[4] = (u_int32_t)&bootx_infos;
/* Set up the info for BAT mapping on Nubus */
regs.GPR[5] = vga_get_videobase() & 0xFF800000UL;
regs.GPR[11] = 1;
printf("\n");
printf("Physical address of kernel will be 0x%08lx\n",
(unsigned long)kernel);
printf("Ok, booting the kernel.\n");
}
else
error("EMILE doesn't support your architecture");
#endif
asm("ori.w #0x0700,%sr");
/* kick off */
#ifdef ARCH_M68K
if (arch_type == gestalt68k)
entry(physImage, info->kernel_size + BI_ALLOC_SIZE, start_mem);
#endif
#ifdef ARCH_PPC
if (arch_type == gestaltPowerPC)
enter_kernelPPC((unsigned long)kernel, &regs);
#endif
error("Kernel startup failed");
return 0;
}
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