EMILE/second/main.c
2007-09-17 22:23:06 +00:00

295 lines
6.4 KiB
C

/*
*
* (c) 2004-2007 Laurent Vivier <Laurent@lvivier.info>
*
*/
#define __NO_INLINE__
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <macos/types.h>
#include <macos/gestalt.h>
#include "bank.h"
#include "memory.h"
#if defined(ARCH_M68K)
#if defined(__LINUX__)
#include "bootinfo.h"
#elif defined(__NETBSD__)
#include "bootenv.h"
#endif
#endif
#ifdef ARCH_PPC
#include "bootx.h"
#include "switch_to_PPC.h"
extern u_int32_t _bootstrap_start;
extern u_int32_t _bootstrap_end;
#endif
#include "arch.h"
#include "misc.h"
#include "load.h"
#include "console.h"
#include "vga.h"
#include "driver.h"
#include "config.h"
#include "serial.h"
#include "enter_kernel.h"
#ifdef ARCH_M68K
#define KERNEL_ALIGN (256L * 1024L) // Kernel alignment, on 256K boundary
#if defined(__LINUX__)
#define BI_ALLOC_SIZE (4096L) // Allocate 4K for bootinfo
#elif defined(__NETBSD__)
#define BI_ALLOC_SIZE (4096L)
#endif
#endif
int start(emile_l2_header_t* info)
{
char * kernel;
#ifdef ARCH_M68K
entry_t entry;
unsigned long physImage;
#ifdef USE_MMU
unsigned long physical;
#ifdef __LINUX__
unsigned long aligned_size;
unsigned long aligned_addr;
#endif /* __LINUX__ */
#endif /* USE_MMU */
int ret;
#endif /* ARCH_M68K */
unsigned long start_mem;
unsigned long entry_point;
int bootstrap_size;
char *ramdisk_start;
unsigned long kernel_size;
unsigned long ramdisk_size;
char *kernel_path = NULL;
char *ramdisk_path = NULL;
char *command_line = NULL;
serial_init();
console_init();
arch_init();
init_memory_map();
#ifdef BANK_DUMP
bank_dump();
#endif
enter_kernel_init();
retry:
if (kernel_path != NULL)
free(kernel_path);
if (command_line != NULL)
free(command_line);
if (ramdisk_path != NULL)
free(command_line);
if (read_config(info, &kernel_path, &command_line, &ramdisk_path) != 0)
error("cannot read configuration\n");
#ifdef ARCH_M68K
if (arch_type == gestalt68k)
{
#if defined(__LINUX__)
/* and BI_ALLOC_SIZE for bootinfo */
bootstrap_size = BI_ALLOC_SIZE +
end_enter_kernel - enter_kernel;
#elif defined(__NETBSD__)
bootstrap_size = BI_ALLOC_SIZE +
end_enter_kernel - enter_kernel;
#endif
}
else
error("EMILE doesn't support your architecture");
#endif
#ifdef ARCH_PPC
if (arch_type == gestaltPowerPC)
{
bootstrap_size = end_enter_kernel - enter_kernel;
}
else
error("EMILE doesn't support your architecture");
#endif
/* load kernel */
kernel = load_kernel(kernel_path,
bootstrap_size,
&start_mem, &entry_point, &kernel_size);
if (kernel == NULL)
{
printf("Cannot load and uncompress kernel image\n");
printf("Press any key");
console_keypressed(0);
goto retry;
}
/* load ramdisk if needed */
if (ramdisk_path)
{
ramdisk_start = load_ramdisk(ramdisk_path, &ramdisk_size);
if (ramdisk_start == NULL)
{
if (kernel != NULL)
free(kernel);
printf("Cannot open ramdisk\n");
printf("Press any key");
console_keypressed(0);
goto retry;
}
}
else
ramdisk_start = 0;
#ifdef ARCH_M68K
if (arch_type == gestalt68k)
{
unsigned long enter_size = end_enter_kernel - enter_kernel;
/* copy enter_kernel at end of kernel */
memcpy((char*)kernel +
kernel_size + bootstrap_size - enter_size,
(char*)enter_kernel, enter_size);
end_enter_kernel = (unsigned long)kernel +
kernel_size + bootstrap_size;
enter_kernel = (unsigned long)kernel +
bootstrap_size - enter_size + kernel_size;
/* compute final address of kernel */
if (mmu_type == gestaltNoMMU)
{
unsigned long size = end_enter_kernel - enter_kernel;
#if defined(__LINUX__)
/* initialize bootinfo structure */
bootinfo_init(command_line,
ramdisk_start, ramdisk_size);
/* set bootinfo at end of kernel image */
set_kernel_bootinfo(kernel + kernel_size);
physImage = (unsigned long)kernel;
#endif
entry = (entry_t)(start_mem - size);
memcpy(entry, (char*)enter_kernel, size);
} else
#ifndef USE_MMU
error("Unsupported MMU");
#else
{
ret = logical2physical((unsigned long)kernel, &physImage);
/* disable and flush cache */
disable_cache();
#if defined(__LINUX__)
/* initialize bootinfo structure */
bootinfo_init(command_line,
ramdisk_start, ramdisk_size);
/* 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;
}
/* set bootinfo at end of kernel image */
set_kernel_bootinfo(kernel + kernel_size);
#elif defined(__NETBSD__)
bootenv_init(kernel + kernel_size);
#endif
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);
}
}
#endif /* USE_MMU */
}
else
#ifndef ARCH_PPC
error("EMILE doesn't support your architecture");
#endif
#endif /* ARCH_M68K */
#ifdef ARCH_PPC
if (arch_type == gestaltPowerPC)
{
PPCRegisterList regs;
bootx_init(command_line, ramdisk_start, ramdisk_size);
regs.PC = (u_int32_t)&_bootstrap_start;
#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] = 1;
regs.GPR[3] = 'BooX';
regs.GPR[4] = (u_int32_t)&bootx_infos;
regs.GPR[5] = 0;
regs.GPR[6] = (int)&_bootstrap_start;
regs.GPR[7] = 0; // where bootstrap must be copied;
regs.GPR[8] = ((((&_bootstrap_end - &_bootstrap_start) + 4095) << 12) >> 12);
regs.GPR[9] = 0; //boot_map_addr;
regs.GPR[10] = (u_int32_t)kernel;
regs.GPR[11] = 0;
switch_to_PPC(&regs);
}
else
error("EMILE doesn't support your architecture");
#endif
turn_off_interrupts();
asm("ori.w #0x0700,%sr");
/* kick off */
#ifdef ARCH_M68K
if (arch_type == gestalt68k)
entry(physImage, kernel_size + BI_ALLOC_SIZE, start_mem, entry_point);
#endif
error("Kernel startup failed");
return 0;
}