146 lines
3.1 KiB
ArmAsm
146 lines
3.1 KiB
ArmAsm
/* -*-Asm-*- */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/boot.h>
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#include <grub/machine/boot.h>
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.text
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.align 4
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.globl _start
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_start:
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/* First stage boot block jumps to us here. */
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pic_base:
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call after_info_block
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mov %o7, PIC_REG
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prom_write_name: .asciz "write"
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prom_seek_name: .asciz "seek"
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prom_read_name: .asciz "read"
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prom_close_name: .asciz "close"
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notification_string: .asciz "Loading kernel"
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#define NOTIFICATION_STRING_LEN 14
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notification_step: .asciz "."
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#define NOTIFICATION_STEP_LEN 1
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notification_done: .asciz "\r\n"
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#define NOTIFICATION_DONE_LEN 2
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.align 4
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/* %o2: message string
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* %o3: message length
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*/
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console_write:
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GET_ABS(prom_write_name, %o0)
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mov STDOUT_NODE_REG, %o1
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/* fallthru */
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/* %o0: OF call name
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* %o1: input arg 1
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* %o2: input arg 2
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* %o3: input arg 3
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*/
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prom_call_3_1:
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mov 3, %g1
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mov 1, %o5
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/* fallthru */
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/* %o0: OF call name
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* %g1: num inputs
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* %o5: num outputs
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* %o1-%o4: inputs
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*/
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prom_call:
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stx %o0, [%l1 + 0x00]
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stx %g1, [%l1 + 0x08]
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stx %o5, [%l1 + 0x10]
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stx %o1, [%l1 + 0x18]
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stx %o2, [%l1 + 0x20]
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stx %o3, [%l1 + 0x28]
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stx %o4, [%l1 + 0x30]
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jmpl CIF_REG, %g0
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mov %l1, %o0
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after_info_block:
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sethi %hi(SCRATCH_PAD_DISKBOOT), %l1 /* OF argument slots */
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GET_ABS(notification_string, %o2)
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call console_write
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mov NOTIFICATION_STRING_LEN, %o3
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GET_ABS(firstlist - GRUB_BOOT_MACHINE_LIST_SIZE, %l2)
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set GRUB_BOOT_MACHINE_IMAGE_ADDRESS, %l3
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bootloop:
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lduw [%l2 + 0x08], %o0
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brz %o0, bootit
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lduw [%l2 + 0x00], %o3
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sllx %o3, 32, %o3
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lduw [%l2 + 0x04], %o4
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or %o3, %o4, %o3
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GET_ABS(prom_seek_name, %o0)
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mov BOOTDEV_REG, %o1
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clr %o2
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call prom_call_3_1
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sllx %o3, 9, %o3
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GET_ABS(prom_read_name, %o0)
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mov BOOTDEV_REG, %o1
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lduw [%l2 + 0x08], %o3
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sllx %o3, 9, %o3
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mov %l3, %o2
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call prom_call_3_1
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add %l3, %o3, %l3
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GET_ABS(notification_step, %o2)
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call console_write
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mov NOTIFICATION_STEP_LEN, %o3
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ba bootloop
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sub %l2, GRUB_BOOT_MACHINE_LIST_SIZE, %l2
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bootit:
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GET_ABS(prom_close_name, %o0)
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mov 1, %g1
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mov 0, %o5
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call prom_call
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mov BOOTDEV_REG, %o1
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GET_ABS(notification_done, %o2)
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call console_write
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mov NOTIFICATION_DONE_LEN, %o3
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sethi %hi(GRUB_BOOT_MACHINE_IMAGE_ADDRESS), %o2
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jmpl %o2 + %lo(GRUB_BOOT_MACHINE_IMAGE_ADDRESS), %o7
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mov CIF_REG, %o4
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1: ba,a 1b
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lastlist:
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.word 0
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.word 0
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. = _start + (0x200 - GRUB_BOOT_MACHINE_LIST_SIZE)
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blocklist_default_start:
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.word 0
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.word 2
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blocklist_default_len:
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.word 0
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firstlist:
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