mirror of
https://github.com/vivier/EMILE.git
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306 lines
6.6 KiB
C
306 lines
6.6 KiB
C
/*
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*
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* (c) 2004-2007 Laurent Vivier <Laurent@Vivier.EU>
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*
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*/
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#define __NO_INLINE__
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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 <unistd.h>
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#include <sys/types.h>
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#include <macos/types.h>
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#include <macos/gestalt.h>
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#include "bank.h"
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#include "memory.h"
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#if defined(ARCH_M68K)
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#if defined(__LINUX__)
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#include "bootinfo.h"
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#elif defined(__NETBSD__)
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#include "bootenv.h"
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#endif
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#endif
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#ifdef ARCH_PPC
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#include "bootx.h"
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#include "switch_to_PPC.h"
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extern u_int32_t _bootstrap_start;
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extern u_int32_t _bootstrap_end;
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#endif
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#include "arch.h"
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#include "misc.h"
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#include "load.h"
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#include "console.h"
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#include "vga.h"
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#include "driver.h"
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#include "config.h"
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#include "serial.h"
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#include "enter_kernel.h"
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#ifdef ARCH_M68K
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#define KERNEL_ALIGN (256L * 1024L) // Kernel alignment, on 256K boundary
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#if defined(__LINUX__)
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#define BI_ALLOC_SIZE (4096L) // Allocate 4K for bootinfo
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#elif defined(__NETBSD__)
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#define BI_ALLOC_SIZE (4096L)
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#endif
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#endif
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typedef void (*loader_t)(void);
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int start(emile_l2_header_t* info)
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{
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char *kernel;
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loader_t loader;
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#ifdef ARCH_M68K
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entry_t entry;
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unsigned long physImage;
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#ifdef USE_MMU
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unsigned long physical;
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#ifdef __LINUX__
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unsigned long aligned_size;
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unsigned long aligned_addr;
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#endif /* __LINUX__ */
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#endif /* USE_MMU */
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int ret;
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#endif /* ARCH_M68K */
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unsigned long start_mem;
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unsigned long entry_point;
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int bootstrap_size;
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char *ramdisk_start;
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unsigned long kernel_size;
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unsigned long ramdisk_size;
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emile_config_t econfig;
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serial_init();
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console_init();
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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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enter_kernel_init();
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memset(&econfig, 0, sizeof(econfig));
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retry:
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if (econfig.kernel != NULL)
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free(econfig.kernel);
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if (econfig.command_line != NULL)
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free(econfig.command_line);
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if (econfig.initrd != NULL)
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free(econfig.initrd);
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if (econfig.chainloader != NULL)
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free(econfig.chainloader);
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if (read_config(info, &econfig) != 0)
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error("cannot read configuration\n");
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if (econfig.chainloader)
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{
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loader = (loader_t)load_chainloader(econfig.chainloader);
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if (loader == NULL)
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goto retry;
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loader();
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}
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#ifdef ARCH_M68K
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if (arch_type == gestalt68k)
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{
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#if defined(__LINUX__)
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/* and BI_ALLOC_SIZE for bootinfo */
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bootstrap_size = BI_ALLOC_SIZE +
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end_enter_kernel - enter_kernel;
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#elif defined(__NETBSD__)
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bootstrap_size = BI_ALLOC_SIZE +
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end_enter_kernel - enter_kernel;
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#endif
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}
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else
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error("EMILE doesn't support your architecture");
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#endif
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#ifdef ARCH_PPC
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if (arch_type == gestaltPowerPC)
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{
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bootstrap_size = end_enter_kernel - enter_kernel;
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}
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else
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error("EMILE doesn't support your architecture");
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#endif
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/* load kernel */
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kernel = load_kernel(econfig.kernel,
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bootstrap_size,
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&start_mem, &entry_point, &kernel_size);
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if (kernel == NULL)
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{
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printf("Cannot load and uncompress kernel image\n");
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printf("Press any key");
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console_keypressed(0);
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goto retry;
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}
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/* load ramdisk if needed */
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if (econfig.initrd)
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{
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ramdisk_start = load_ramdisk(econfig.initrd, &ramdisk_size);
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if (ramdisk_start == NULL)
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{
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if (kernel != NULL)
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free(kernel);
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printf("Cannot open ramdisk\n");
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printf("Press any key");
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console_keypressed(0);
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goto retry;
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}
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}
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else
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ramdisk_start = 0;
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#ifdef ARCH_M68K
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if (arch_type == gestalt68k)
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{
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unsigned long enter_size = end_enter_kernel - enter_kernel;
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/* copy enter_kernel at end of kernel */
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memcpy((char*)kernel +
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kernel_size + bootstrap_size - enter_size,
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(char*)enter_kernel, enter_size);
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end_enter_kernel = (unsigned long)kernel +
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kernel_size + bootstrap_size;
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enter_kernel = (unsigned long)kernel +
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bootstrap_size - enter_size + kernel_size;
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/* compute final address of kernel */
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if (mmu_type == gestaltNoMMU)
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{
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unsigned long size = end_enter_kernel - enter_kernel;
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#if defined(__LINUX__)
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/* initialize bootinfo structure */
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bootinfo_init(econfig.command_line,
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ramdisk_start, ramdisk_size);
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/* set bootinfo at end of kernel image */
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set_kernel_bootinfo(kernel + kernel_size);
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physImage = (unsigned long)kernel;
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#endif
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entry = (entry_t)(start_mem - size);
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memcpy(entry, (char*)enter_kernel, size);
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} else
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#ifndef USE_MMU
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error("Unsupported MMU");
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#else
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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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#if defined(__LINUX__)
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/* initialize bootinfo structure */
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bootinfo_init(econfig.command_line,
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ramdisk_start, ramdisk_size);
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/* add KERNEL_ALIGN if we have to align */
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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 + kernel_size);
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#elif defined(__NETBSD__)
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bootenv_init(kernel + kernel_size);
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#endif
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ret = logical2physical(enter_kernel, &physical);
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entry = (entry_t)physical;
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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 = vga_get_video();
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ret = logical2physical(logi, &physical);
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entry = (entry_t)physical;
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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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}
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#endif /* USE_MMU */
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}
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else
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#ifndef ARCH_PPC
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error("EMILE doesn't support your architecture");
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#endif
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#endif /* ARCH_M68K */
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turn_off_interrupts();
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asm("ori.w #0x0700,%sr");
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/* kick off */
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#ifdef ARCH_PPC
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if (arch_type == gestaltPowerPC)
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{
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PPCRegisterList regs;
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bootx_init(econfig.command_line, ramdisk_start, ramdisk_size);
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regs.PC = (u_int32_t)&_bootstrap_start;
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#define BOOT_KERNEL_STACK_SIZE 65536
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regs.GPR[1] = (u_int32_t)malloc_contiguous(BOOT_KERNEL_STACK_SIZE) + BOOT_KERNEL_STACK_SIZE - 512;
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regs.GPR[2] = 1;
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regs.GPR[3] = 'BooX';
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regs.GPR[4] = (u_int32_t)&bootx_infos;
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regs.GPR[5] = 0;
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regs.GPR[6] = (int)&_bootstrap_start;
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regs.GPR[7] = 0; // where bootstrap must be copied;
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regs.GPR[8] = ((((&_bootstrap_end - &_bootstrap_start) + 4095) << 12) >> 12);
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regs.GPR[9] = 0; //boot_map_addr;
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regs.GPR[10] = (u_int32_t)kernel;
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regs.GPR[11] = 0;
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switch_to_PPC(®s);
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}
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else
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error("EMILE doesn't support your architecture");
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#endif
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#ifdef ARCH_M68K
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if (arch_type == gestalt68k)
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entry(physImage, kernel_size + BI_ALLOC_SIZE, start_mem, entry_point);
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#endif
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error("Kernel startup failed");
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return 0;
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}
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