diff options
Diffstat (limited to 'grub-core/boot/sparc64/ieee1275/diskboot.S')
| -rw-r--r-- | grub-core/boot/sparc64/ieee1275/diskboot.S | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/grub-core/boot/sparc64/ieee1275/diskboot.S b/grub-core/boot/sparc64/ieee1275/diskboot.S new file mode 100644 index 0000000..35e02c1 --- /dev/null +++ b/grub-core/boot/sparc64/ieee1275/diskboot.S @@ -0,0 +1,145 @@ +/* -*-Asm-*- */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/machine/boot.h> +#include <grub/offsets.h> + + .text + .align 4 + .globl _start +_start: + /* First stage boot block jumps to us here. */ +pic_base: + call after_info_block + mov %o7, PIC_REG + +prom_write_name: .asciz "write" +prom_seek_name: .asciz "seek" +prom_read_name: .asciz "read" +prom_close_name: .asciz "close" + +notification_string: .asciz "Loading kernel" +#define NOTIFICATION_STRING_LEN 14 + +notification_step: .asciz "." +#define NOTIFICATION_STEP_LEN 1 + +notification_done: .asciz "\r\n" +#define NOTIFICATION_DONE_LEN 2 + + .align 4 + + /* %o2: message string + * %o3: message length + */ +console_write: + GET_ABS(prom_write_name, %o0) + mov STDOUT_NODE_REG, %o1 + /* fallthru */ + + /* %o0: OF call name + * %o1: input arg 1 + * %o2: input arg 2 + * %o3: input arg 3 + */ +prom_call_3_1: + mov 3, %g1 + mov 1, %o5 + /* fallthru */ + + /* %o0: OF call name + * %g1: num inputs + * %o5: num outputs + * %o1-%o4: inputs + */ +prom_call: + stx %o0, [%l1 + 0x00] + stx %g1, [%l1 + 0x08] + stx %o5, [%l1 + 0x10] + stx %o1, [%l1 + 0x18] + stx %o2, [%l1 + 0x20] + stx %o3, [%l1 + 0x28] + stx %o4, [%l1 + 0x30] + jmpl CIF_REG, %g0 + mov %l1, %o0 + + +after_info_block: + sethi %hi(SCRATCH_PAD_DISKBOOT), %l1 /* OF argument slots */ + + GET_ABS(notification_string, %o2) + call console_write + mov NOTIFICATION_STRING_LEN, %o3 + + GET_ABS(firstlist - GRUB_BOOT_SPARC64_IEEE1275_LIST_SIZE, %l2) + set GRUB_BOOT_SPARC64_IEEE1275_IMAGE_ADDRESS, %l3 +bootloop: + lduw [%l2 + 0x08], %o0 + brz %o0, bootit + lduw [%l2 + 0x00], %o3 + sllx %o3, 32, %o3 + lduw [%l2 + 0x04], %o4 + or %o3, %o4, %o3 + GET_ABS(prom_seek_name, %o0) + mov BOOTDEV_REG, %o1 + clr %o2 + call prom_call_3_1 + sllx %o3, 9, %o3 + + GET_ABS(prom_read_name, %o0) + mov BOOTDEV_REG, %o1 + lduw [%l2 + 0x08], %o3 + sllx %o3, 9, %o3 + mov %l3, %o2 + call prom_call_3_1 + add %l3, %o3, %l3 + + GET_ABS(notification_step, %o2) + call console_write + mov NOTIFICATION_STEP_LEN, %o3 + + ba bootloop + sub %l2, GRUB_BOOT_SPARC64_IEEE1275_LIST_SIZE, %l2 + +bootit: + GET_ABS(prom_close_name, %o0) + mov 1, %g1 + mov 0, %o5 + call prom_call + mov BOOTDEV_REG, %o1 + + GET_ABS(notification_done, %o2) + call console_write + mov NOTIFICATION_DONE_LEN, %o3 + sethi %hi(GRUB_BOOT_SPARC64_IEEE1275_IMAGE_ADDRESS), %o2 + jmpl %o2 + %lo(GRUB_BOOT_SPARC64_IEEE1275_IMAGE_ADDRESS), %o7 + mov CIF_REG, %o4 +1: ba,a 1b + +lastlist: + .word 0 + .word 0 + + .org (0x200 - GRUB_BOOT_SPARC64_IEEE1275_LIST_SIZE) +blocklist_default_start: + .word 0 + .word 2 +blocklist_default_len: + .word 0 +firstlist: |