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61 lines
1.0 KiB
61 lines
1.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#include <linux/sys.h> |
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#include <linux/init.h> |
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#include <asm/unistd.h> |
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#include <asm/setup.h> |
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#include <asm/segment.h> |
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#include <asm/linkage.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/thread_info.h> |
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#include <asm/errno.h> |
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#if defined(CONFIG_CPU_H8300H) |
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.h8300h |
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#define SYSCR 0xfee012 |
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#define IRAMTOP 0xffff20 |
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#endif |
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#if defined(CONFIG_CPU_H8S) |
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.h8300s |
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#define INTCR 0xffff31 |
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#define IRAMTOP 0xffc000 |
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#endif |
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__HEAD |
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.global _start |
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_start: |
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mov.l #IRAMTOP,sp |
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/* .bss clear */ |
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mov.l #_sbss,er5 |
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mov.l #_ebss,er4 |
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sub.l er5,er4 |
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shlr er4 |
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shlr er4 |
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sub.l er2,er2 |
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1: |
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mov.l er2,@er5 |
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adds #4,er5 |
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dec.l #1,er4 |
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bne 1b |
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jsr @h8300_fdt_init |
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/* linux kernel start */ |
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#if defined(CONFIG_CPU_H8300H) |
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ldc #0xd0,ccr /* running kernel */ |
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mov.l #SYSCR,er0 |
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bclr #3,@er0 |
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#endif |
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#if defined(CONFIG_CPU_H8S) |
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ldc #0x07,exr |
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bclr #4,@INTCR:8 |
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bset #5,@INTCR:8 /* Interrupt mode 2 */ |
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ldc #0x90,ccr /* running kernel */ |
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#endif |
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mov.l #init_thread_union,sp |
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add.l #0x2000,sp |
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jsr @start_kernel |
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1: |
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bra 1b |
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.end
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