qemu/roms/openbios/arch/ppc/qemu/main.c

   1 /*
   2  *   Creation Date: <2002/10/02 22:24:24 samuel>
   3  *   Time-stamp: <2004/03/27 01:57:55 samuel>
   4  *
   5  *      <main.c>
   6  *
   7  *
   8  *
   9  *   Copyright (C) 2002, 2003, 2004 Samuel Rydh (samuel@ibrium.se)
  10  *
  11  *   This program is free software; you can redistribute it and/or
  12  *   modify it under the terms of the GNU General Public License
  13  *   as published by the Free Software Foundation
  14  *
  15  */
  16
  17 #include "config.h"
  18 #include "libopenbios/bindings.h"
  19 #include "libopenbios/elf_load.h"
  20 #include "arch/common/nvram.h"
  21 #include "packages/nvram.h"
  22 #include "libc/diskio.h"
  23 #include "libc/vsprintf.h"
  24 #include "kernel.h"
  25 #include "drivers/drivers.h"
  26 #include "libopenbios/ofmem.h"
  27 #define NO_QEMU_PROTOS
  28 #include "arch/common/fw_cfg.h"
  29
  30 //#define DEBUG_QEMU
  31
  32 #ifdef DEBUG_QEMU
  33 #define SUBSYS_DPRINTF(subsys, fmt, args...) \
  34     do { printk("%s - %s: " fmt, subsys, __func__ , ##args); } while (0)
  35 #else
  36 #define SUBSYS_DPRINTF(subsys, fmt, args...) \
  37     do { } while (0)
  38 #endif
  39 #define CHRP_DPRINTF(fmt, args...) SUBSYS_DPRINTF("CHRP", fmt, ##args)
  40 #define ELF_DPRINTF(fmt, args...) SUBSYS_DPRINTF("ELF", fmt, ##args)
  41 #define NEWWORLD_DPRINTF(fmt, args...) SUBSYS_DPRINTF("NEWWORLD", fmt, ##args)
  42
  43 static void check_preloaded_kernel(void)
  44 {
  45     unsigned long kernel_image, kernel_size;
  46     unsigned long initrd_image, initrd_size;
  47     const char * kernel_cmdline;
  48
  49     kernel_size = fw_cfg_read_i32(FW_CFG_KERNEL_SIZE);
  50     if (kernel_size) {
  51         kernel_image = fw_cfg_read_i32(FW_CFG_KERNEL_ADDR);
  52         kernel_cmdline = (const char *)(uintptr_t) fw_cfg_read_i32(FW_CFG_KERNEL_CMDLINE);
  53         initrd_image = fw_cfg_read_i32(FW_CFG_INITRD_ADDR);
  54         initrd_size = fw_cfg_read_i32(FW_CFG_INITRD_SIZE);
  55         printk("[ppc] Kernel already loaded (0x%8.8lx + 0x%8.8lx) "
  56                "(initrd 0x%8.8lx + 0x%8.8lx)\n",
  57                kernel_image, kernel_size, initrd_image, initrd_size);
  58         if (kernel_cmdline) {
  59                phandle_t ph;
  60                printk("[ppc] Kernel command line: %s\n", kernel_cmdline);
  61                ph = find_dev("/chosen");
  62                set_property(ph, "bootargs", strdup(kernel_cmdline), strlen(kernel_cmdline) + 1);
  63         }
  64         call_elf(initrd_image, initrd_size, kernel_image);
  65     }
  66 }
  67
  68 /************************************************************************/
  69 /*      entry                                                           */
  70 /************************************************************************/
  71
  72 void
  73 boot( void )
  74 {
  75         uint16_t boot_device = fw_cfg_read_i16(FW_CFG_BOOT_DEVICE);
  76
  77         fword("update-chosen");
  78         if (boot_device == 'm') {
  79                 check_preloaded_kernel();
  80         }
  81
  82         if (is_apple()) {
  83                 update_nvram();
  84         }
  85 }