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-rw-r--r--arch/v850/kernel/head.S128
1 files changed, 0 insertions, 128 deletions
diff --git a/arch/v850/kernel/head.S b/arch/v850/kernel/head.S
deleted file mode 100644
index c490b937ef1..00000000000
--- a/arch/v850/kernel/head.S
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * arch/v850/kernel/head.S -- Lowest-level startup code
- *
- * Copyright (C) 2001,02,03 NEC Electronics Corporation
- * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file COPYING in the main directory of this
- * archive for more details.
- *
- * Written by Miles Bader <miles@gnu.org>
- */
-
-#include <asm/clinkage.h>
-#include <asm/current.h>
-#include <asm/entry.h>
-#include <asm/thread_info.h>
-#include <asm/irq.h>
-
-
-/* Make a slightly more convenient alias for C_SYMBOL_NAME. */
-#define CSYM C_SYMBOL_NAME
-
-
- .text
-
- // Define `mach_early_init' as a weak symbol
- .global CSYM(mach_early_init)
- .weak CSYM(mach_early_init)
-
-C_ENTRY(start):
- // Make sure interrupts are turned off, just in case
- di
-
-#ifdef CONFIG_RESET_GUARD
- // See if we got here via an unexpected reset
- ld.w RESET_GUARD, r19 // Check current value of reset guard
- mov RESET_GUARD_ACTIVE, r20
- cmp r19, r20
- bne 1f // Guard was not active
-
- // If we get here, the reset guard was active. Load up some
- // interesting values as arguments, and jump to the handler.
- st.w r0, RESET_GUARD // Allow further resets to succeed
- mov lp, r6 // Arg 0: return address
- ld.b KM, r7 // Arg 1: kernel mode
- mov sp, r9 // Arg 3: stack pointer
- ld.w KSP, r19 // maybe switch to kernel stack
- cmp r7, r0 // see if already in kernel mode
- cmov z, r19, sp, sp // and switch to kernel stack if not
- GET_CURRENT_TASK(r8) // Arg 2: task pointer
- jr CSYM(unexpected_reset)
-
-1: st.w r20, RESET_GUARD // Turn on reset guard
-#endif /* CONFIG_RESET_GUARD */
-
- // Setup a temporary stack for doing pre-initialization function calls.
- //
- // We can't use the initial kernel stack, because (1) it may be
- // located in memory we're not allowed to touch, and (2) since
- // it's in the data segment, calling memcpy to initialize that
- // area from ROM will overwrite memcpy's return address.
- mov hilo(CSYM(_init_stack_end) - 4), sp
-
- // See if there's a platform-specific early-initialization routine
- // defined; it's a weak symbol, so it will have an address of zero if
- // there's not.
- mov hilo(CSYM(mach_early_init)), r6
- cmp r6, r0
- bz 3f
-
- // There is one, so call it. If this function is written in C, it
- // should be very careful -- the stack pointer is valid, but very
- // little else is (e.g., bss is not zeroed yet, and initialized data
- // hasn't been).
- jarl 2f, lp // first figure out return address
-2: add 3f - ., lp
- jmp [r6] // do call
-3:
-
-#ifdef CONFIG_ROM_KERNEL
- // Copy the data area from ROM to RAM
- mov hilo(CSYM(_rom_copy_dst_start)), r6
- mov hilo(CSYM(_rom_copy_src_start)), r7
- mov hilo(CSYM(_rom_copy_dst_end)), r8
- sub r6, r8
- jarl CSYM(memcpy), lp
-#endif
-
- // Load the initial thread's stack, and current task pointer (in r16)
- mov hilo(CSYM(init_thread_union)), r19
- movea THREAD_SIZE, r19, sp
- ld.w TI_TASK[r19], CURRENT_TASK
-
-#ifdef CONFIG_TIME_BOOTUP
- /* This stuff must come after mach_early_init, because interrupts may
- not work until after its been called. */
- jarl CSYM(highres_timer_reset), lp
- jarl CSYM(highres_timer_start), lp
-#endif
-
- // Kernel stack pointer save location
- st.w sp, KSP
-
- // Assert that we're in `kernel mode'
- mov 1, r19
- st.w r19, KM
-
-#ifdef CONFIG_ZERO_BSS
- // Zero bss area, since we can't rely upon any loader to do so
- mov hilo(CSYM(_sbss)), r6
- mov r0, r7
- mov hilo(CSYM(_ebss)), r8
- sub r6, r8
- jarl CSYM(memset), lp
-#endif
-
- // What happens if the main kernel function returns (it shouldn't)
- mov hilo(CSYM(machine_halt)), lp
-
- // Start the linux kernel. We use an indirect jump to get extra
- // range, because on some platforms this initial startup code
- // (and the associated platform-specific code in mach_early_init)
- // are located far away from the main kernel, e.g. so that they
- // can initialize RAM first and copy the kernel or something.
- mov hilo(CSYM(start_kernel)), r12
- jmp [r12]
-C_END(start)