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-rw-r--r--arch/m32r/kernel/head.S284
1 files changed, 0 insertions, 284 deletions
diff --git a/arch/m32r/kernel/head.S b/arch/m32r/kernel/head.S
deleted file mode 100644
index 1f040973df1c..000000000000
--- a/arch/m32r/kernel/head.S
+++ /dev/null
@@ -1,284 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/arch/m32r/kernel/head.S
- *
- * M32R startup code.
- *
- * Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata,
- * Hitoshi Yamamoto
- */
-
-#include <linux/init.h>
-__INIT
-__INITDATA
-
- .text
-#include <linux/linkage.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/assembler.h>
-#include <asm/m32r.h>
-#include <asm/mmu_context.h>
-
-/*
- * References to members of the boot_cpu_data structure.
- */
-__HEAD
- .global start_kernel
- .global __bss_start
- .global _end
-ENTRY(stext)
-ENTRY(_stext)
- /* Setup up the stack pointer */
- LDIMM (r0, spi_stack_top)
- LDIMM (r1, spu_stack_top)
- mvtc r0, spi
- mvtc r1, spu
-
- /* Initilalize PSW */
- ldi r0, #0x0000 /* use SPI, disable EI */
- mvtc r0, psw
-
- /* Set up the stack pointer */
- LDIMM (r0, stack_start)
- ld r0, @r0
- mvtc r0, spi
-
-/*
- * Clear BSS first so that there are no surprises...
- */
-#ifdef CONFIG_ISA_DUAL_ISSUE
-
- LDIMM (r2, __bss_start)
- LDIMM (r3, _end)
- sub r3, r2 ; BSS size in bytes
- ; R4 = BSS size in longwords (rounded down)
- mv r4, r3 || ldi r1, #0
- srli r4, #4 || addi r2, #-4
- beqz r4, .Lendloop1
-.Lloop1:
-#ifndef CONFIG_CHIP_M32310
- ; Touch memory for the no-write-allocating cache.
- ld r0, @(4,r2)
-#endif
- st r1, @+r2 || addi r4, #-1
- st r1, @+r2
- st r1, @+r2
- st r1, @+r2 || cmpeq r1, r4 ; R4 = 0?
- bnc .Lloop1
-.Lendloop1:
- and3 r4, r3, #15
- addi r2, #4
- beqz r4, .Lendloop2
-.Lloop2:
- stb r1, @r2 || addi r4, #-1
- addi r2, #1
- bnez r4, .Lloop2
-.Lendloop2:
-
-#else /* not CONFIG_ISA_DUAL_ISSUE */
-
- LDIMM (r2, __bss_start)
- LDIMM (r3, _end)
- sub r3, r2 ; BSS size in bytes
- mv r4, r3
- srli r4, #2 ; R4 = BSS size in longwords (rounded down)
- ldi r1, #0 ; clear R1 for longwords store
- addi r2, #-4 ; account for pre-inc store
- beqz r4, .Lendloop1 ; any more to go?
-.Lloop1:
- st r1, @+r2 ; yep, zero out another longword
- addi r4, #-1 ; decrement count
- bnez r4, .Lloop1 ; go do some more
-.Lendloop1:
- and3 r4, r3, #3 ; get no. of remaining BSS bytes to clear
- addi r2, #4 ; account for pre-inc store
- beqz r4, .Lendloop2 ; any more to go?
-.Lloop2:
- stb r1, @r2 ; yep, zero out another byte
- addi r2, #1 ; bump address
- addi r4, #-1 ; decrement count
- bnez r4, .Lloop2 ; go do some more
-.Lendloop2:
-
-#endif /* not CONFIG_ISA_DUAL_ISSUE */
-
-#if 0 /* M32R_FIXME */
-/*
- * Copy data segment from ROM to RAM.
- */
- .global ROM_D, TOP_DATA, END_DATA
-
- LDIMM (r1, ROM_D)
- LDIMM (r2, TOP_DATA)
- LDIMM (r3, END_DATA)
- addi r2, #-4
- addi r3, #-4
-loop1:
- ld r0, @r1+
- st r0, @+r2
- cmp r2, r3
- bc loop1
-#endif /* 0 */
-
-/* Jump to kernel */
- LDIMM (r2, start_kernel)
- jl r2
- .fillinsn
-1:
- bra 1b ; main should never return here, but
- ; just in case, we know what happens.
-
-#ifdef CONFIG_SMP
-/*
- * AP startup routine
- */
- .global eit_vector
-ENTRY(startup_AP)
-;; setup EVB
- LDIMM (r4, eit_vector)
- mvtc r4, cr5
-
-;; enable MMU
- LDIMM (r2, init_tlb)
- jl r2
- seth r4, #high(MATM)
- or3 r4, r4, #low(MATM)
- ldi r5, #0x01
- st r5, @r4 ; Set MATM Reg(T bit ON)
- ld r6, @r4 ; MATM Check
- LDIMM (r5, 1f)
- jmp r5 ; enable MMU
- nop
- .fillinsn
-1:
-;; ISN check
- ld r6, @r4 ; MATM Check
- seth r4, #high(M32R_ICU_ISTS_ADDR)
- or3 r4, r4, #low(M32R_ICU_ISTS_ADDR)
- ld r5, @r4 ; Read ISTSi reg.
- mv r6, r5
- slli r5, #13 ; PIML check
- srli r5, #13 ;
- seth r4, #high(M32R_ICU_IMASK_ADDR)
- or3 r4, r4, #low(M32R_ICU_IMASK_ADDR)
- st r5, @r4 ; Write IMASKi reg.
- slli r6, #4 ; ISN check
- srli r6, #26 ;
- seth r4, #high(M32R_IRQ_IPI5)
- or3 r4, r4, #low(M32R_IRQ_IPI5)
- bne r4, r6, 2f ; if (ISN != CPU_BOOT_IPI) goto sleep;
-
-;; check cpu_bootout_map and set cpu_bootin_map
- LDIMM (r4, cpu_bootout_map)
- ld r4, @r4
- seth r5, #high(M32R_CPUID_PORTL)
- or3 r5, r5, #low(M32R_CPUID_PORTL)
- ld r5, @r5
- ldi r6, #1
- sll r6, r5
- and r4, r6
- beqz r4, 2f
- LDIMM (r4, cpu_bootin_map)
- ld r5, @r4
- or r5, r6
- st r6, @r4
-
-;; clear PSW
- ldi r4, #0
- mvtc r4, psw
-
-;; setup SPI
- LDIMM (r4, stack_start)
- ld r4, @r4
- mvtc r4, spi
-
-;; setup BPC (start_secondary)
- LDIMM (r4, start_secondary)
- mvtc r4, bpc
-
- rte ; goto startup_secondary
- nop
- nop
-
- .fillinsn
-2:
- ;; disable MMU
- seth r4, #high(MATM)
- or3 r4, r4, #low(MATM)
- ldi r5, #0
- st r5, @r4 ; Set MATM Reg(T bit OFF)
- ld r6, @r4 ; MATM Check
- LDIMM (r4, 3f)
- seth r5, #high(__PAGE_OFFSET)
- or3 r5, r5, #low(__PAGE_OFFSET)
- not r5, r5
- and r4, r5
- jmp r4 ; disable MMU
- nop
- .fillinsn
-3:
- ;; SLEEP and wait IPI
- LDIMM (r4, AP_loop)
- seth r5, #high(__PAGE_OFFSET)
- or3 r5, r5, #low(__PAGE_OFFSET)
- not r5, r5
- and r4, r5
- jmp r4
- nop
- nop
-#endif /* CONFIG_SMP */
-
- .text
-ENTRY(stack_start)
- .long init_thread_union+8192
- .long __KERNEL_DS
-
-/*
- * This is initialized to create a identity-mapping at 0-4M (for bootup
- * purposes) and another mapping of the 0-4M area at virtual address
- * PAGE_OFFSET.
- */
- .text
-
-#define MOUNT_ROOT_RDONLY 1
-#define RAMDISK_FLAGS 0 ; 1024KB
-#define ORIG_ROOT_DEV 0x0100 ; /dev/ram0 (major:01, minor:00)
-#define LOADER_TYPE 1 ; (??? - non-zero value seems
- ; to be needed to boot from initrd)
-
-#define COMMAND_LINE ""
-
- .section .empty_zero_page, "aw"
-ENTRY(empty_zero_page)
- .long MOUNT_ROOT_RDONLY /* offset: +0x00 */
- .long RAMDISK_FLAGS
- .long ORIG_ROOT_DEV
- .long LOADER_TYPE
- .long 0 /* INITRD_START */ /* +0x10 */
- .long 0 /* INITRD_SIZE */
- .long 0 /* CPU_CLOCK */
- .long 0 /* BUS_CLOCK */
- .long 0 /* TIMER_DIVIDE */ /* +0x20 */
- .balign 256,0
- .asciz COMMAND_LINE
- .byte 0
- .balign 4096,0,4096
-
-/*------------------------------------------------------------------------
- * Stack area
- */
- .section .init.data, "aw"
- ALIGN
- .global spi_stack_top
- .zero 1024
-spi_stack_top:
-
- .section .init.data, "aw"
- ALIGN
- .global spu_stack_top
- .zero 1024
-spu_stack_top:
-
- .end
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