*
* Kernel startup code for all 32-bit CPUs
*/
-#include <linux/config.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/thread_info.h>
#include <asm/system.h>
-#define PROCINFO_MMUFLAGS 8
-#define PROCINFO_INITFUNC 12
-
-#define MACHINFO_TYPE 0
-#define MACHINFO_PHYSIO 4
-#define MACHINFO_PGOFFIO 8
-#define MACHINFO_NAME 12
-
#define KERNEL_RAM_ADDR (PAGE_OFFSET + TEXT_OFFSET)
/*
__INIT
.type stext, %function
ENTRY(stext)
- msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | MODE_SVC @ ensure svc mode
+ msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
@ and irqs disabled
mrc p15, 0, r9, c0, c0 @ get processor id
bl __lookup_processor_type @ r5=procinfo r9=cpuid
adr lr, __enable_mmu @ return (PIC) address
add pc, r10, #PROCINFO_INITFUNC
- .type __switch_data, %object
-__switch_data:
- .long __mmap_switched
- .long __data_loc @ r4
- .long __data_start @ r5
- .long __bss_start @ r6
- .long _end @ r7
- .long processor_id @ r4
- .long __machine_arch_type @ r5
- .long cr_alignment @ r6
- .long init_thread_union + THREAD_START_SP @ sp
-
-/*
- * The following fragment of code is executed with the MMU on, and uses
- * absolute addresses; this is not position independent.
- *
- * r0 = cp#15 control register
- * r1 = machine ID
- * r9 = processor ID
- */
- .type __mmap_switched, %function
-__mmap_switched:
- adr r3, __switch_data + 4
-
- ldmia r3!, {r4, r5, r6, r7}
- cmp r4, r5 @ Copy data segment if needed
-1: cmpne r5, r6
- ldrne fp, [r4], #4
- strne fp, [r5], #4
- bne 1b
-
- mov fp, #0 @ Clear BSS (and zero fp)
-1: cmp r6, r7
- strcc fp, [r6],#4
- bcc 1b
-
- ldmia r3, {r4, r5, r6, sp}
- str r9, [r4] @ Save processor ID
- str r1, [r5] @ Save machine type
- bic r4, r0, #CR_A @ Clear 'A' bit
- stmia r6, {r0, r4} @ Save control register values
- b start_kernel
-
#if defined(CONFIG_SMP)
.type secondary_startup, #function
ENTRY(secondary_startup)
* the processor type - there is no need to check the machine type
* as it has already been validated by the primary processor.
*/
- msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | MODE_SVC
+ msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
mrc p15, 0, r9, c0, c0 @ get processor id
bl __lookup_processor_type
movs r10, r5 @ invalid processor?
teq r0, r6
bne 1b
- ldr r7, [r10, #PROCINFO_MMUFLAGS] @ mmuflags
+ ldr r7, [r10, #PROCINFO_MM_MMUFLAGS] @ mm_mmuflags
/*
* Create identity mapping for first MB of kernel to
#endif
#ifdef CONFIG_DEBUG_LL
- bic r7, r7, #0x0c @ turn off cacheable
- @ and bufferable bits
+ ldr r7, [r10, #PROCINFO_IO_MMUFLAGS] @ io_mmuflags
/*
* Map in IO space for serial debugging.
* This allows debug messages to be output
mov pc, lr
.ltorg
-
-
-/*
- * Exception handling. Something went wrong and we can't proceed. We
- * ought to tell the user, but since we don't have any guarantee that
- * we're even running on the right architecture, we do virtually nothing.
- *
- * If CONFIG_DEBUG_LL is set we try to print out something about the error
- * and hope for the best (useful if bootloader fails to pass a proper
- * machine ID for example).
- */
-
- .type __error_p, %function
-__error_p:
-#ifdef CONFIG_DEBUG_LL
- adr r0, str_p1
- bl printascii
- b __error
-str_p1: .asciz "\nError: unrecognized/unsupported processor variant.\n"
- .align
-#endif
-
- .type __error_a, %function
-__error_a:
-#ifdef CONFIG_DEBUG_LL
- mov r4, r1 @ preserve machine ID
- adr r0, str_a1
- bl printascii
- mov r0, r4
- bl printhex8
- adr r0, str_a2
- bl printascii
- adr r3, 3f
- ldmia r3, {r4, r5, r6} @ get machine desc list
- sub r4, r3, r4 @ get offset between virt&phys
- add r5, r5, r4 @ convert virt addresses to
- add r6, r6, r4 @ physical address space
-1: ldr r0, [r5, #MACHINFO_TYPE] @ get machine type
- bl printhex8
- mov r0, #'\t'
- bl printch
- ldr r0, [r5, #MACHINFO_NAME] @ get machine name
- add r0, r0, r4
- bl printascii
- mov r0, #'\n'
- bl printch
- add r5, r5, #SIZEOF_MACHINE_DESC @ next machine_desc
- cmp r5, r6
- blo 1b
- adr r0, str_a3
- bl printascii
- b __error
-str_a1: .asciz "\nError: unrecognized/unsupported machine ID (r1 = 0x"
-str_a2: .asciz ").\n\nAvailable machine support:\n\nID (hex)\tNAME\n"
-str_a3: .asciz "\nPlease check your kernel config and/or bootloader.\n"
- .align
-#endif
-
- .type __error, %function
-__error:
-#ifdef CONFIG_ARCH_RPC
-/*
- * Turn the screen red on a error - RiscPC only.
- */
- mov r0, #0x02000000
- mov r3, #0x11
- orr r3, r3, r3, lsl #8
- orr r3, r3, r3, lsl #16
- str r3, [r0], #4
- str r3, [r0], #4
- str r3, [r0], #4
- str r3, [r0], #4
-#endif
-1: mov r0, r0
- b 1b
-
-
-/*
- * Read processor ID register (CP#15, CR0), and look up in the linker-built
- * supported processor list. Note that we can't use the absolute addresses
- * for the __proc_info lists since we aren't running with the MMU on
- * (and therefore, we are not in the correct address space). We have to
- * calculate the offset.
- *
- * r9 = cpuid
- * Returns:
- * r3, r4, r6 corrupted
- * r5 = proc_info pointer in physical address space
- * r9 = cpuid (preserved)
- */
- .type __lookup_processor_type, %function
-__lookup_processor_type:
- adr r3, 3f
- ldmda r3, {r5 - r7}
- sub r3, r3, r7 @ get offset between virt&phys
- add r5, r5, r3 @ convert virt addresses to
- add r6, r6, r3 @ physical address space
-1: ldmia r5, {r3, r4} @ value, mask
- and r4, r4, r9 @ mask wanted bits
- teq r3, r4
- beq 2f
- add r5, r5, #PROC_INFO_SZ @ sizeof(proc_info_list)
- cmp r5, r6
- blo 1b
- mov r5, #0 @ unknown processor
-2: mov pc, lr
-
-/*
- * This provides a C-API version of the above function.
- */
-ENTRY(lookup_processor_type)
- stmfd sp!, {r4 - r7, r9, lr}
- mov r9, r0
- bl __lookup_processor_type
- mov r0, r5
- ldmfd sp!, {r4 - r7, r9, pc}
-
-/*
- * Look in include/asm-arm/procinfo.h and arch/arm/kernel/arch.[ch] for
- * more information about the __proc_info and __arch_info structures.
- */
- .long __proc_info_begin
- .long __proc_info_end
-3: .long .
- .long __arch_info_begin
- .long __arch_info_end
-
-/*
- * Lookup machine architecture in the linker-build list of architectures.
- * Note that we can't use the absolute addresses for the __arch_info
- * lists since we aren't running with the MMU on (and therefore, we are
- * not in the correct address space). We have to calculate the offset.
- *
- * r1 = machine architecture number
- * Returns:
- * r3, r4, r6 corrupted
- * r5 = mach_info pointer in physical address space
- */
- .type __lookup_machine_type, %function
-__lookup_machine_type:
- adr r3, 3b
- ldmia r3, {r4, r5, r6}
- sub r3, r3, r4 @ get offset between virt&phys
- add r5, r5, r3 @ convert virt addresses to
- add r6, r6, r3 @ physical address space
-1: ldr r3, [r5, #MACHINFO_TYPE] @ get machine type
- teq r3, r1 @ matches loader number?
- beq 2f @ found
- add r5, r5, #SIZEOF_MACHINE_DESC @ next machine_desc
- cmp r5, r6
- blo 1b
- mov r5, #0 @ unknown machine
-2: mov pc, lr
-
-/*
- * This provides a C-API version of the above function.
- */
-ENTRY(lookup_machine_type)
- stmfd sp!, {r4 - r6, lr}
- mov r1, r0
- bl __lookup_machine_type
- mov r0, r5
- ldmfd sp!, {r4 - r6, pc}
+#include "head-common.S"
git.openpandora.org / pandora-kernel.git / blobdiff