/* crt0.S - Startup code for the Sparc64. */ /* * 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/symbol.h> #include <grub/machine/kernel.h> .text .align 4 .globl _start _start: ba codestart nop . = EXT_C(_start) + GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE VARIABLE(grub_total_module_size) .word 0 VARIABLE(grub_kernel_image_size) .word 0 VARIABLE(grub_compressed_size) .word 0 VARIABLE(grub_prefix) /* to be filled by grub-mkimage */ /* * Leave some breathing room for the prefix. */ . = EXT_C(_start) + GRUB_KERNEL_MACHINE_DATA_END codestart: /* Copy the modules past the end of the kernel image. * They are currently sitting in the BSS. */ sethi %hi(__bss_start), %o2 or %o2, %lo(__bss_start), %o2 sethi %hi(_end), %o3 or %o3, %lo(_end), %o3 sethi %hi(grub_total_module_size), %o4 lduw [%o4 + %lo(grub_total_module_size)], %o4 1: lduw [%o2], %o5 stw %o5, [%o3] subcc %o4, 4, %o4 add %o2, 4, %o2 bne,pt %icc, 1b add %o3, 4, %o3 /* Now it's safe to clear out the BSS. */ sethi %hi(__bss_start), %o2 or %o2, %lo(__bss_start), %o2 sethi %hi(_end), %o3 or %o3, %lo(_end), %o3 1: stx %g0, [%o2] add %o2, 8, %o2 cmp %o2, %o3 blt,pt %xcc, 1b nop sethi %hi(grub_ieee1275_entry_fn), %o2 stx %o0, [%o2 + %lo(grub_ieee1275_entry_fn)] call grub_main nop 1: ba,a 1b