^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/arm/kernel/head-common.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1994-2002 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2003 ARM Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * All Rights Reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <asm/assembler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define ATAG_CORE 0x54410001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define ATAG_CORE_SIZE ((2*4 + 3*4) >> 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define ATAG_CORE_SIZE_EMPTY ((2*4) >> 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #ifdef CONFIG_CPU_BIG_ENDIAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define OF_DT_MAGIC 0xd00dfeed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define OF_DT_MAGIC 0xedfe0dd0 /* 0xd00dfeed in big-endian */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Exception handling. Something went wrong and we can't proceed. We
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * ought to tell the user, but since we don't have any guarantee that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * we're even running on the right architecture, we do virtually nothing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * If CONFIG_DEBUG_LL is set we try to print out something about the error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * and hope for the best (useful if bootloader fails to pass a proper
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * machine ID for example).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) __HEAD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* Determine validity of the r2 atags pointer. The heuristic requires
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * that the pointer be aligned, in the first 16k of physical RAM and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * that the ATAG_CORE marker is first and present. If CONFIG_OF_FLATTREE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * is selected, then it will also accept a dtb pointer. Future revisions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * of this function may be more lenient with the physical address and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * may also be able to move the ATAGS block if necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * r2 either valid atags pointer, valid dtb pointer, or zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * r5, r6 corrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) __vet_atags:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) tst r2, #0x3 @ aligned?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) bne 1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) ldr r5, [r2, #0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #ifdef CONFIG_OF_FLATTREE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ldr r6, =OF_DT_MAGIC @ is it a DTB?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) cmp r5, r6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) beq 2f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) cmp r5, #ATAG_CORE_SIZE @ is first tag ATAG_CORE?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) cmpne r5, #ATAG_CORE_SIZE_EMPTY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) bne 1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) ldr r5, [r2, #4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ldr r6, =ATAG_CORE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) cmp r5, r6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) bne 1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 2: ret lr @ atag/dtb pointer is ok
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 1: mov r2, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ENDPROC(__vet_atags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * The following fragment of code is executed with the MMU on in MMU mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * and uses absolute addresses; this is not position independent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * r0 = cp#15 control register (exc_ret for M-class)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * r1 = machine ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * r2 = atags/dtb pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * r9 = processor ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) __INIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) __mmap_switched:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) mov r7, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) mov r8, r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) mov r10, r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) adr r4, __mmap_switched_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) mov fp, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #if defined(CONFIG_XIP_DEFLATED_DATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ARM( ldr sp, [r4], #4 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) THUMB( ldr sp, [r4] )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) THUMB( add r4, #4 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) bl __inflate_kernel_data @ decompress .data to RAM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) teq r0, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) bne __error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #elif defined(CONFIG_XIP_KERNEL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ARM( ldmia r4!, {r0, r1, r2, sp} )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) THUMB( ldmia r4!, {r0, r1, r2, r3} )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) THUMB( mov sp, r3 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) sub r2, r2, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) bl memcpy @ copy .data to RAM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) ARM( ldmia r4!, {r0, r1, sp} )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) THUMB( ldmia r4!, {r0, r1, r3} )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) THUMB( mov sp, r3 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) sub r2, r1, r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) mov r1, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) bl memset @ clear .bss
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ldmia r4, {r0, r1, r2, r3}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) str r9, [r0] @ Save processor ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) str r7, [r1] @ Save machine type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) str r8, [r2] @ Save atags pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) cmp r3, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) strne r10, [r3] @ Save control register values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) mov lr, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) b start_kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) ENDPROC(__mmap_switched)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .align 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .type __mmap_switched_data, %object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) __mmap_switched_data:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #ifdef CONFIG_XIP_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #ifndef CONFIG_XIP_DEFLATED_DATA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .long _sdata @ r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .long __data_loc @ r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .long _edata_loc @ r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .long __bss_stop @ sp (temporary stack in .bss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .long __bss_start @ r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .long __bss_stop @ r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .long init_thread_union + THREAD_START_SP @ sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .long processor_id @ r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .long __machine_arch_type @ r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .long __atags_pointer @ r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #ifdef CONFIG_CPU_CP15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .long cr_alignment @ r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) M_CLASS(.long exc_ret) @ r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) AR_CLASS(.long 0) @ r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .size __mmap_switched_data, . - __mmap_switched_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) __FINIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) .text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * This provides a C-API version of __lookup_processor_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ENTRY(lookup_processor_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) stmfd sp!, {r4 - r6, r9, lr}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) mov r9, r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) bl __lookup_processor_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) mov r0, r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) ldmfd sp!, {r4 - r6, r9, pc}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ENDPROC(lookup_processor_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * Read processor ID register (CP#15, CR0), and look up in the linker-built
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * supported processor list. Note that we can't use the absolute addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * for the __proc_info lists since we aren't running with the MMU on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * (and therefore, we are not in the correct address space). We have to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * calculate the offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * r9 = cpuid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * r3, r4, r6 corrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * r5 = proc_info pointer in physical address space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * r9 = cpuid (preserved)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) __lookup_processor_type:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) adr r3, __lookup_processor_type_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) ldmia r3, {r4 - r6}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) sub r3, r3, r4 @ get offset between virt&phys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) add r5, r5, r3 @ convert virt addresses to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) add r6, r6, r3 @ physical address space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 1: ldmia r5, {r3, r4} @ value, mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) and r4, r4, r9 @ mask wanted bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) teq r3, r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) beq 2f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) add r5, r5, #PROC_INFO_SZ @ sizeof(proc_info_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) cmp r5, r6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) blo 1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) mov r5, #0 @ unknown processor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 2: ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) ENDPROC(__lookup_processor_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * Look in <asm/procinfo.h> for information about the __proc_info structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .align 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .type __lookup_processor_type_data, %object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) __lookup_processor_type_data:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) .long .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .long __proc_info_begin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .long __proc_info_end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .size __lookup_processor_type_data, . - __lookup_processor_type_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) __error_lpae:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) #ifdef CONFIG_DEBUG_LL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) adr r0, str_lpae
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) bl printascii
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) b __error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) str_lpae: .asciz "\nError: Kernel with LPAE support, but CPU does not support LPAE.\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) b __error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) .align
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) ENDPROC(__error_lpae)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) __error_p:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) #ifdef CONFIG_DEBUG_LL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) adr r0, str_p1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) bl printascii
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) mov r0, r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) bl printhex8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) adr r0, str_p2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) bl printascii
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) b __error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) str_p1: .asciz "\nError: unrecognized/unsupported processor variant (0x"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) str_p2: .asciz ").\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) .align
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) ENDPROC(__error_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) __error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) #ifdef CONFIG_ARCH_RPC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * Turn the screen red on a error - RiscPC only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) mov r0, #0x02000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) mov r3, #0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) orr r3, r3, r3, lsl #8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) orr r3, r3, r3, lsl #16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) str r3, [r0], #4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) str r3, [r0], #4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) str r3, [r0], #4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) str r3, [r0], #4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 1: mov r0, r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) b 1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) ENDPROC(__error)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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