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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
commit | 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e (patch) | |
tree | 32451fa3cdd9321fb2591fada9891b2cb70a9cd1 /grub-core/boot/mips/startup_raw.S | |
parent | Initial commit. (diff) | |
download | grub2-upstream.tar.xz grub2-upstream.zip |
Adding upstream version 2.06.upstream/2.06upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'grub-core/boot/mips/startup_raw.S')
-rw-r--r-- | grub-core/boot/mips/startup_raw.S | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/grub-core/boot/mips/startup_raw.S b/grub-core/boot/mips/startup_raw.S new file mode 100644 index 0000000..6a81b37 --- /dev/null +++ b/grub-core/boot/mips/startup_raw.S @@ -0,0 +1,300 @@ +/* startup.S - Startup code for the MIPS. */ +/* + * 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/offsets.h> +#include <grub/machine/memory.h> +#include <grub/machine/kernel.h> +#include <grub/offsets.h> +#include <grub/mips/asm.h> + +#define BASE_ADDR 8 + +.extern __bss_start +.extern _end +.extern _edata + + .globl __start, _start, start + .set noreorder + .set nomacro +__start: +_start: +start: + + bal codestart + nop +base: + .org GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE +compressed_size: + .long 0 + .org GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_SIZE +uncompressed_size: + .long 0 + .org GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_ADDR +uncompressed_addr: + .long 0 +codestart: + /* Save our base. */ + move $s0, $ra + + /* Parse arguments. Has to be done before relocation. + So need to do it in asm. */ +#ifdef GRUB_MACHINE_MIPS_QEMU_MIPS + lui $t0, %hi (((16 << 20) - 264 + 4) | 0x80000000) + lw $t1, %lo (((16 << 20) - 264 + 4) | 0x80000000) ($t0) + + lui $t2, 0x1234 + ori $t2, 0x5678 + + bne $t1, $t2, 1f + nop + + lui $t0, %hi (((16 << 20) - 264) | 0x80000000) + b 2f + lw $s4, %lo (((16 << 20) - 264) | 0x80000000) ($t0) + +1: + li $s4, 0 +2: +#endif + +#ifdef GRUB_MACHINE_MIPS_LOONGSON + move $s2, $zero + move $s3, $zero + move $s4, $zero + move $s5, $zero + move $s7, $zero + + /* $a2 has the environment. */ + addiu $t0, $zero, -0x10 + and $t1, $a2, $t0 + beq $t0, $t1, argfw + nop + move $t0, $a2 +argcont: + lw $t1, 0($t0) + beq $t1, $zero, argdone + nop +#define DO_PARSE(str, reg) \ + addiu $t2, $s0, (str-base);\ + bal parsestr;\ + nop ;\ + beq $v0, $zero, 1f;\ + nop ;\ + b 2f;\ + move reg, $v0; \ +1: +#define DO_CHECKT1(str, val) \ + move $t6, $t1 ;\ + addiu $t7, $s0, (str - base);\ + bal do_check ;\ + li $t2, val + + DO_PARSE (busclockstr, $s2) + DO_PARSE (cpuclockstr, $s3) + DO_PARSE (memsizestr, $s4) + DO_PARSE (highmemsizestr, $s5) + DO_CHECKT1 (pmon_yeeloong_verstr, GRUB_ARCH_MACHINE_YEELOONG) + DO_CHECKT1 (pmon_fuloong2f_verstr, GRUB_ARCH_MACHINE_FULOONG2F) +2: + b argcont + addiu $t0, $t0, 4 +parsestr: + move $v0, $zero + move $t3, $t1 +3: + lb GRUB_ASM_T4, 0($t2) + lb GRUB_ASM_T5, 0($t3) + addiu $t2, $t2, 1 + addiu $t3, $t3, 1 + beq GRUB_ASM_T5, $zero, 1f + nop + beq GRUB_ASM_T5, GRUB_ASM_T4, 3b + nop + bne GRUB_ASM_T4, $zero, 1f + nop + + addiu $t3, $t3, 0xffff +digcont: + lb GRUB_ASM_T5, 0($t3) + /* Substract '0' from digit. */ + addiu GRUB_ASM_T5, GRUB_ASM_T5, 0xffd0 + bltz GRUB_ASM_T5, 1f + nop + addiu GRUB_ASM_T4, GRUB_ASM_T5, 0xfff7 + bgtz GRUB_ASM_T4, 1f + nop + /* Multiply $v0 by 10 with bitshifts. */ + sll $v0, $v0, 1 + sll GRUB_ASM_T4, $v0, 2 + addu $v0, $v0, GRUB_ASM_T4 + addu $v0, $v0, GRUB_ASM_T5 + addiu $t3, $t3, 1 + b digcont + nop +1: + jr $ra + nop +busclockstr: .asciz "busclock=" +cpuclockstr: .asciz "cpuclock=" +memsizestr: .asciz "memsize=" +highmemsizestr: .asciz "highmemsize=" +machtype_yeeloong_str1: .asciz "machtype=8.9" +machtype_yeeloong_str2: .asciz "machtype=lemote-yeeloong-" +machtype_fuloong2f_str: .asciz "machtype=lemote-fuloong-2f" +machtype_fuloong2e_str: .asciz "machtype=lemote-fuloong-2e" +pmon_yeeloong_str: .asciz "PMON_VER=LM8" +pmon_fuloong2f_str: .asciz "PMON_VER=LM6" +pmon_yeeloong_verstr: .asciz "Version=LM8" +pmon_fuloong2f_verstr: .asciz "Version=LM6" + .p2align 2 + +argdone: + beq $a0, $zero, cmdlinedone + nop +#define DO_CHECKA1(str, val) \ + lw $t6, 0($a1) ;\ + addiu $t7, $s0, (str - base);\ + bal do_check ;\ + li $t2, val + DO_CHECKA1 (machtype_yeeloong_str1, GRUB_ARCH_MACHINE_YEELOONG) + DO_CHECKA1 (machtype_yeeloong_str2, GRUB_ARCH_MACHINE_YEELOONG) + DO_CHECKA1 (pmon_yeeloong_str, GRUB_ARCH_MACHINE_YEELOONG) + DO_CHECKA1 (machtype_fuloong2f_str, GRUB_ARCH_MACHINE_FULOONG2F) + DO_CHECKA1 (machtype_fuloong2e_str, GRUB_ARCH_MACHINE_FULOONG2E) + DO_CHECKA1 (pmon_fuloong2f_str, GRUB_ARCH_MACHINE_FULOONG2F) + addiu $a0, $a0, -1 + b argdone + addiu $a1, $a1, 4 +do_check: + lb GRUB_ASM_T4, 0($t7) + beq GRUB_ASM_T4, $zero, 1f + lb $t3, 0($t6) + bne $t3, GRUB_ASM_T4, 2f + addiu $t6, $t6, 1 + b do_check + addiu $t7, $t7, 1 +1: + move $s7, $t2 +2: + jr $ra + nop +argfw: + not $s7, $a2 +cmdlinedone: +#endif +#ifdef GRUB_MACHINE_ARC + lui $t0, %hi(_start - 256) + addiu $t0, $t0, %lo(_start - 256) + addiu $t3, $t0, 255 + lw $t1, 0($a1) +1: + bne $t0, $t3, 2f + lb $t2, 0($t1) + move $t2, $zero +2: + sb $t2, 0($t0) + addiu $t0, $t0, 1 + bnez $t2, 1b + addiu $t1, $t1, 1 +#endif + /* Copy the decompressor. */ + lui $t1, %hi(base) + addiu $t1, $t1, %lo(base) + lui $t3, %hi(__bss_start) + addiu $t3, $t3, %lo(__bss_start) + move $t2, $s0 + +1: + beq $t1, $t3, 2f + lb GRUB_ASM_T4, 0($t2) + sb GRUB_ASM_T4, 0($t1) + addiu $t1, $t1, 1 + b 1b + addiu $t2, $t2, 1 +2: + /* Clean out its BSS. */ + lui $t1, %hi(__bss_start) + addiu $t1, $t1, %lo(__bss_start) + lui $t2, %hi(_end) + addiu $t2, $t2, %lo(_end) +1: + beq $t1, $t2, 2f + nop + sb $zero, 0($t1) + b 1b + addiu $t1, $t1, 1 +2: + lui $a0, %hi(base) + addiu $a0, $a0, %lo(base) + lui $a1, %hi(_end) + addiu $a1, %lo(_end) + subu $a1,$a1,$a0 + +#include "../../kern/mips/cache_flush.S" + + /* Decompress the payload. */ + lui $a0, %hi(_edata) + addiu $a0, $a0, %lo(_edata) + + lui $t0, %hi(base) + addiu $t0, $t0, %lo(base) + subu $a0, $a0, $t0 + addu $a0, $a0, $s0 + + lw $a1, (GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_ADDR - BASE_ADDR)($s0) + lw $a2, (GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE - BASE_ADDR)($s0) + lw $a3, (GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_SIZE - BASE_ADDR)($s0) + move $s1, $a1 + + /* $a0 contains source compressed address, $a1 is destination, + $a2 is compressed size, $a3 is uncompressed size. + */ + move $s6, $a3 + + lui $t9, %hi(EXT_C(grub_decompress_core)) + addiu $t9, $t9, %lo(EXT_C(grub_decompress_core)) + +#ifdef GRUB_MACHINE_ARC + lui $sp, %hi(_start - 512) + jalr $t9 + addiu $sp, $sp, %lo(_start - 512) +#else + lui $sp, %hi(_start - 256) + jalr $t9 + addiu $sp, $sp, %lo(_start - 256) +#endif + move $a0, $s1 + move $a1, $s6 + +#include "../../kern/mips/cache_flush.S" + + lui $t1, %hi(GRUB_MACHINE_LINK_ADDR) + addiu $t1, %lo(GRUB_MACHINE_LINK_ADDR) + + jr $t1 + nop + /* Ensure that .data section is created. In code we suppose that _edata + is first location not in decompressor image. Strictly speaking it's + _edata only when .data is present and _etext otherwise. But checking + for .data presence would cost more in code than it is to ensure that + .data is created. + */ + .data + .long 0 |