mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 15:12:21 +00:00
941338725d
This is an init function so move it out of the common header. Avoid using the typedef so that we don't have to include the global_data header file. Also tidy up the function style in comments while we are here. Signed-off-by: Simon Glass <sjg@chromium.org>
676 lines
13 KiB
ArmAsm
676 lines
13 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* (C) Copyright 2008 - 2013 Tensilica Inc.
|
|
* (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/cacheasm.h>
|
|
#include <asm/regs.h>
|
|
#include <asm/arch/tie.h>
|
|
#include <asm-offsets.h>
|
|
|
|
/*
|
|
* Offsets into the the pt_regs struture.
|
|
* Make sure these always match with the structure defined in ptrace.h!
|
|
*/
|
|
|
|
#define PT_PC 0
|
|
#define PT_PS 4
|
|
#define PT_DEPC 8
|
|
#define PT_EXCCAUSE 12
|
|
#define PT_EXCVADDR 16
|
|
#define PT_DEBUGCAUSE 20
|
|
#define PT_WMASK 24
|
|
#define PT_LBEG 28
|
|
#define PT_LEND 32
|
|
#define PT_LCOUNT 36
|
|
#define PT_SAR 40
|
|
#define PT_WINDOWBASE 44
|
|
#define PT_WINDOWSTART 48
|
|
#define PT_SYSCALL 52
|
|
#define PT_ICOUNTLEVEL 56
|
|
#define PT_RESERVED 60
|
|
#define PT_AREG 64
|
|
#define PT_SIZE (64 + 64)
|
|
|
|
/*
|
|
* Cache attributes are different for full MMU and region protection.
|
|
*/
|
|
|
|
#if XCHAL_HAVE_PTP_MMU
|
|
#define CA_WRITEBACK (0x7)
|
|
#else
|
|
#define CA_WRITEBACK (0x4)
|
|
#endif
|
|
|
|
/*
|
|
* Reset vector.
|
|
* Only a trampoline to jump to _start
|
|
* (Note that we have to mark the section writable as the section contains
|
|
* a relocatable literal)
|
|
*/
|
|
|
|
.section .ResetVector.text, "awx"
|
|
.global _ResetVector
|
|
_ResetVector:
|
|
|
|
j 1f
|
|
.align 4
|
|
2: .long _start
|
|
1: l32r a2, 2b
|
|
jx a2
|
|
|
|
|
|
/*
|
|
* Processor initialization. We still run in rom space.
|
|
*
|
|
* NOTE: Running in ROM
|
|
* For Xtensa, we currently don't allow to run some code from ROM but
|
|
* unpack the data immediately to memory. This requires, for example,
|
|
* that DDR has been set up before running U-Boot. (See also comments
|
|
* inline for ways to change it)
|
|
*/
|
|
|
|
.section .reset.text, "ax"
|
|
.global _start
|
|
.align 4
|
|
_start:
|
|
/* Keep a0 = 0 for various initializations */
|
|
|
|
movi a0, 0
|
|
|
|
/*
|
|
* For full MMU cores, put page table at unmapped virtual address.
|
|
* This ensures that accesses outside the static maps result
|
|
* in miss exceptions rather than random behaviour.
|
|
*/
|
|
|
|
#if XCHAL_HAVE_PTP_MMU
|
|
wsr a0, PTEVADDR
|
|
#endif
|
|
|
|
/* Disable dbreak debug exceptions */
|
|
|
|
#if XCHAL_HAVE_DEBUG && XCHAL_NUM_DBREAK > 0
|
|
.set _index, 0
|
|
.rept XCHAL_NUM_DBREAK
|
|
wsr a0, DBREAKC + _index
|
|
.set _index, _index + 1
|
|
.endr
|
|
#endif
|
|
|
|
/* Reset windowbase and windowstart */
|
|
|
|
#if XCHAL_HAVE_WINDOWED
|
|
movi a3, 1
|
|
wsr a3, windowstart
|
|
wsr a0, windowbase
|
|
rsync
|
|
movi a0, 0 /* windowbase might have changed */
|
|
#endif
|
|
|
|
/*
|
|
* Vecbase in bitstream may differ from header files
|
|
* set or check it.
|
|
*/
|
|
|
|
#if XCHAL_HAVE_VECBASE
|
|
movi a3, XCHAL_VECBASE_RESET_VADDR /* VECBASE reset value */
|
|
wsr a3, VECBASE
|
|
#endif
|
|
|
|
#if XCHAL_HAVE_LOOPS
|
|
/* Disable loops */
|
|
|
|
wsr a0, LCOUNT
|
|
#endif
|
|
|
|
/* Set PS.WOE = 0, PS.EXCM = 0 (for loop), PS.INTLEVEL = EXCM level */
|
|
|
|
#if XCHAL_HAVE_XEA1
|
|
movi a2, 1
|
|
#else
|
|
movi a2, XCHAL_EXCM_LEVEL
|
|
#endif
|
|
wsr a2, PS
|
|
rsync
|
|
|
|
/* Unlock and invalidate caches */
|
|
|
|
___unlock_dcache_all a2, a3
|
|
___invalidate_dcache_all a2, a3
|
|
___unlock_icache_all a2, a3
|
|
___invalidate_icache_all a2, a3
|
|
|
|
isync
|
|
|
|
/* Unpack data sections */
|
|
|
|
movi a2, __reloc_table_start
|
|
movi a3, __reloc_table_end
|
|
|
|
1: beq a2, a3, 3f # no more entries?
|
|
l32i a4, a2, 0 # start destination (in RAM)
|
|
l32i a5, a2, 4 # end destination (in RAM)
|
|
l32i a6, a2, 8 # start source (in ROM)
|
|
addi a2, a2, 12 # next entry
|
|
beq a4, a5, 1b # skip, empty entry
|
|
beq a4, a6, 1b # skip, source and destination are the same
|
|
|
|
/* If there's memory protection option with 512MB TLB regions and
|
|
* cache attributes in TLB entries and caching is not inhibited,
|
|
* enable data/instruction cache for relocated image.
|
|
*/
|
|
#if XCHAL_HAVE_SPANNING_WAY && \
|
|
!(CONFIG_IS_ENABLED(SYS_DCACHE_OFF) && \
|
|
CONFIG_IS_ENABLED(SYS_ICACHE_OFF))
|
|
srli a7, a4, 29
|
|
slli a7, a7, 29
|
|
addi a7, a7, XCHAL_SPANNING_WAY
|
|
#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
|
|
rdtlb1 a8, a7
|
|
srli a8, a8, 4
|
|
slli a8, a8, 4
|
|
addi a8, a8, CA_WRITEBACK
|
|
wdtlb a8, a7
|
|
#endif
|
|
#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
|
|
ritlb1 a8, a7
|
|
srli a8, a8, 4
|
|
slli a8, a8, 4
|
|
addi a8, a8, CA_WRITEBACK
|
|
witlb a8, a7
|
|
#endif
|
|
isync
|
|
#endif
|
|
|
|
2: l32i a7, a6, 0
|
|
addi a6, a6, 4
|
|
s32i a7, a4, 0
|
|
addi a4, a4, 4
|
|
bltu a4, a5, 2b
|
|
j 1b
|
|
|
|
3: /* All code and initalized data segments have been copied */
|
|
|
|
/* Setup PS, PS.WOE = 1, PS.EXCM = 0, PS.INTLEVEL = EXCM level. */
|
|
|
|
#if __XTENSA_CALL0_ABI__
|
|
movi a2, XCHAL_EXCM_LEVEL
|
|
#else
|
|
movi a2, (1<<PS_WOE_BIT) | XCHAL_EXCM_LEVEL
|
|
#endif
|
|
wsr a2, PS
|
|
rsync
|
|
|
|
/* Writeback */
|
|
|
|
___flush_dcache_all a2, a3
|
|
|
|
#ifdef __XTENSA_WINDOWED_ABI__
|
|
/*
|
|
* In windowed ABI caller and call target need to be within the same
|
|
* gigabyte. Put the rest of the code into the text segment and jump
|
|
* there.
|
|
*/
|
|
|
|
movi a4, .Lboard_init_code
|
|
jx a4
|
|
|
|
.text
|
|
.align 4
|
|
.Lboard_init_code:
|
|
#endif
|
|
|
|
movi a0, 0
|
|
movi sp, (XTENSA_SYS_TEXT_ADDR - 16) & 0xfffffff0
|
|
|
|
#ifdef CONFIG_DEBUG_UART
|
|
movi a4, debug_uart_init
|
|
#ifdef __XTENSA_CALL0_ABI__
|
|
callx0 a4
|
|
#else
|
|
callx4 a4
|
|
#endif
|
|
#endif
|
|
|
|
movi a4, board_init_f_alloc_reserve
|
|
|
|
#ifdef __XTENSA_CALL0_ABI__
|
|
mov a2, sp
|
|
callx0 a4
|
|
mov sp, a2
|
|
#else
|
|
mov a6, sp
|
|
callx4 a4
|
|
movsp sp, a6
|
|
#endif
|
|
|
|
movi a4, board_init_f_init_reserve
|
|
|
|
#ifdef __XTENSA_CALL0_ABI__
|
|
callx0 a4
|
|
#else
|
|
callx4 a4
|
|
#endif
|
|
|
|
/*
|
|
* Call board initialization routine (never returns).
|
|
*/
|
|
|
|
movi a4, board_init_f
|
|
|
|
#ifdef __XTENSA_CALL0_ABI__
|
|
movi a2, 0
|
|
callx0 a4
|
|
#else
|
|
movi a6, 0
|
|
callx4 a4
|
|
#endif
|
|
/* Never Returns */
|
|
ill
|
|
|
|
/*
|
|
* void relocate_code(addr_sp, gd, addr_moni)
|
|
*
|
|
* This "function" does not return, instead it continues in RAM
|
|
* after relocating the monitor code.
|
|
*
|
|
* a2 = addr_sp
|
|
* a3 = gd
|
|
* a4 = destination address
|
|
*/
|
|
.text
|
|
.globl relocate_code
|
|
.align 4
|
|
relocate_code:
|
|
abi_entry
|
|
|
|
#ifdef __XTENSA_CALL0_ABI__
|
|
mov a1, a2
|
|
mov a2, a3
|
|
mov a3, a4
|
|
movi a0, board_init_r
|
|
callx0 a0
|
|
#else
|
|
/* We can't movsp here, because the chain of stack frames may cross
|
|
* the now reserved memory. We need to toss all window frames except
|
|
* the current, create new pristine stack frame and start from scratch.
|
|
*/
|
|
rsr a0, windowbase
|
|
ssl a0
|
|
movi a0, 1
|
|
sll a0, a0
|
|
wsr a0, windowstart
|
|
rsync
|
|
|
|
movi a0, 0
|
|
|
|
/* Reserve 16-byte save area */
|
|
addi sp, a2, -16
|
|
mov a6, a3
|
|
mov a7, a4
|
|
movi a4, board_init_r
|
|
callx4 a4
|
|
#endif
|
|
ill
|
|
|
|
#if XCHAL_HAVE_EXCEPTIONS
|
|
|
|
/*
|
|
* Exception vectors.
|
|
*
|
|
* Various notes:
|
|
* - We currently don't use the user exception vector (PS.UM is always 0),
|
|
* but do define such a vector, just in case. They both jump to the
|
|
* same exception handler, though.
|
|
* - We currently only save the bare minimum number of registers:
|
|
* a0...a15, sar, loop-registers, exception register (epc1, excvaddr,
|
|
* exccause, depc)
|
|
* - WINDOWSTART is only saved to identify if registers have been spilled
|
|
* to the wrong stack (exception stack) while executing the exception
|
|
* handler.
|
|
*/
|
|
|
|
.section .KernelExceptionVector.text, "ax"
|
|
.global _KernelExceptionVector
|
|
_KernelExceptionVector:
|
|
|
|
wsr a2, EXCSAVE1
|
|
movi a2, ExceptionHandler
|
|
jx a2
|
|
|
|
.section .UserExceptionVector.text, "ax"
|
|
.global _UserExceptionVector
|
|
_UserExceptionVector:
|
|
|
|
wsr a2, EXCSAVE1
|
|
movi a2, ExceptionHandler
|
|
jx a2
|
|
|
|
#if !XCHAL_HAVE_XEA1
|
|
.section .DoubleExceptionVector.text, "ax"
|
|
.global _DoubleExceptionVector
|
|
_DoubleExceptionVector:
|
|
|
|
#ifdef __XTENSA_CALL0_ABI__
|
|
wsr a0, EXCSAVE1
|
|
movi a0, hang # report and ask user to reset board
|
|
callx0 a0
|
|
#else
|
|
wsr a4, EXCSAVE1
|
|
movi a4, hang # report and ask user to reset board
|
|
callx4 a4
|
|
#endif
|
|
#endif
|
|
/* Does not return here */
|
|
|
|
|
|
.text
|
|
.align 4
|
|
ExceptionHandler:
|
|
|
|
rsr a2, EXCCAUSE # find handler
|
|
|
|
#if XCHAL_HAVE_WINDOWED
|
|
/* Special case for alloca handler */
|
|
|
|
bnei a2, 5, 1f # jump if not alloca exception
|
|
|
|
addi a1, a1, -16 - 4 # create a small stack frame
|
|
s32i a3, a1, 0 # and save a3 (a2 still in excsave1)
|
|
movi a2, fast_alloca_exception
|
|
jx a2 # jump to fast_alloca_exception
|
|
#endif
|
|
/* All other exceptions go here: */
|
|
|
|
/* Create ptrace stack and save a0...a3 */
|
|
|
|
1: addi a2, a1, - PT_SIZE - 16
|
|
s32i a0, a2, PT_AREG + 0 * 4
|
|
s32i a1, a2, PT_AREG + 1 * 4
|
|
s32i a3, a2, PT_AREG + 3 * 4
|
|
rsr a3, EXCSAVE1
|
|
s32i a3, a2, PT_AREG + 2 * 4
|
|
mov a1, a2
|
|
|
|
/* Save remaining AR registers */
|
|
|
|
s32i a4, a1, PT_AREG + 4 * 4
|
|
s32i a5, a1, PT_AREG + 5 * 4
|
|
s32i a6, a1, PT_AREG + 6 * 4
|
|
s32i a7, a1, PT_AREG + 7 * 4
|
|
s32i a8, a1, PT_AREG + 8 * 4
|
|
s32i a9, a1, PT_AREG + 9 * 4
|
|
s32i a10, a1, PT_AREG + 10 * 4
|
|
s32i a11, a1, PT_AREG + 11 * 4
|
|
s32i a12, a1, PT_AREG + 12 * 4
|
|
s32i a13, a1, PT_AREG + 13 * 4
|
|
s32i a14, a1, PT_AREG + 14 * 4
|
|
s32i a15, a1, PT_AREG + 15 * 4
|
|
|
|
/* Save SRs */
|
|
|
|
#if XCHAL_HAVE_WINDOWED
|
|
rsr a2, WINDOWSTART
|
|
s32i a2, a1, PT_WINDOWSTART
|
|
#endif
|
|
|
|
rsr a2, SAR
|
|
rsr a3, EPC1
|
|
rsr a4, EXCVADDR
|
|
s32i a2, a1, PT_SAR
|
|
s32i a3, a1, PT_PC
|
|
s32i a4, a1, PT_EXCVADDR
|
|
|
|
#if XCHAL_HAVE_LOOPS
|
|
movi a2, 0
|
|
rsr a3, LBEG
|
|
xsr a2, LCOUNT
|
|
s32i a3, a1, PT_LBEG
|
|
rsr a3, LEND
|
|
s32i a2, a1, PT_LCOUNT
|
|
s32i a3, a1, PT_LEND
|
|
#endif
|
|
|
|
/* Set up C environment and call registered handler */
|
|
/* Setup stack, PS.WOE = 1, PS.EXCM = 0, PS.INTLEVEL = EXCM level. */
|
|
|
|
rsr a2, EXCCAUSE
|
|
#if XCHAL_HAVE_XEA1
|
|
movi a3, (1<<PS_WOE_BIT) | 1
|
|
#elif __XTENSA_CALL0_ABI__
|
|
movi a3, XCHAL_EXCM_LEVEL
|
|
#else
|
|
movi a3, (1<<PS_WOE_BIT) | XCHAL_EXCM_LEVEL
|
|
#endif
|
|
xsr a3, PS
|
|
rsync
|
|
s32i a2, a1, PT_EXCCAUSE
|
|
s32i a3, a1, PT_PS
|
|
|
|
movi a0, exc_table
|
|
addx4 a0, a2, a0
|
|
l32i a0, a0, 0
|
|
#ifdef __XTENSA_CALL0_ABI__
|
|
mov a2, a1 # Provide stack frame as only argument
|
|
callx0 a0
|
|
l32i a3, a1, PT_PS
|
|
#else
|
|
mov a6, a1 # Provide stack frame as only argument
|
|
callx4 a0
|
|
#endif
|
|
|
|
/* Restore PS and go to exception mode (PS.EXCM=1) */
|
|
|
|
wsr a3, PS
|
|
|
|
/* Restore SR registers */
|
|
|
|
#if XCHAL_HAVE_LOOPS
|
|
l32i a2, a1, PT_LBEG
|
|
l32i a3, a1, PT_LEND
|
|
l32i a4, a1, PT_LCOUNT
|
|
wsr a2, LBEG
|
|
wsr a3, LEND
|
|
wsr a4, LCOUNT
|
|
#endif
|
|
|
|
l32i a2, a1, PT_SAR
|
|
l32i a3, a1, PT_PC
|
|
wsr a2, SAR
|
|
wsr a3, EPC1
|
|
|
|
#if XCHAL_HAVE_WINDOWED
|
|
/* Do we need to simulate a MOVSP? */
|
|
|
|
l32i a2, a1, PT_WINDOWSTART
|
|
addi a3, a2, -1
|
|
and a2, a2, a3
|
|
beqz a2, 1f # Skip if regs were spilled before exc.
|
|
|
|
rsr a2, WINDOWSTART
|
|
addi a3, a2, -1
|
|
and a2, a2, a3
|
|
bnez a2, 1f # Skip if registers aren't spilled now
|
|
|
|
addi a2, a1, -16
|
|
l32i a4, a2, 0
|
|
l32i a5, a2, 4
|
|
s32i a4, a1, PT_SIZE + 0
|
|
s32i a5, a1, PT_SIZE + 4
|
|
l32i a4, a2, 8
|
|
l32i a5, a2, 12
|
|
s32i a4, a1, PT_SIZE + 8
|
|
s32i a5, a1, PT_SIZE + 12
|
|
#endif
|
|
|
|
/* Restore address register */
|
|
|
|
1: l32i a15, a1, PT_AREG + 15 * 4
|
|
l32i a14, a1, PT_AREG + 14 * 4
|
|
l32i a13, a1, PT_AREG + 13 * 4
|
|
l32i a12, a1, PT_AREG + 12 * 4
|
|
l32i a11, a1, PT_AREG + 11 * 4
|
|
l32i a10, a1, PT_AREG + 10 * 4
|
|
l32i a9, a1, PT_AREG + 9 * 4
|
|
l32i a8, a1, PT_AREG + 8 * 4
|
|
l32i a7, a1, PT_AREG + 7 * 4
|
|
l32i a6, a1, PT_AREG + 6 * 4
|
|
l32i a5, a1, PT_AREG + 5 * 4
|
|
l32i a4, a1, PT_AREG + 4 * 4
|
|
l32i a3, a1, PT_AREG + 3 * 4
|
|
l32i a2, a1, PT_AREG + 2 * 4
|
|
l32i a0, a1, PT_AREG + 0 * 4
|
|
|
|
l32i a1, a1, PT_AREG + 1 * 4 # Remove ptrace stack frame
|
|
|
|
rfe
|
|
|
|
#endif /* XCHAL_HAVE_EXCEPTIONS */
|
|
|
|
#if XCHAL_HAVE_WINDOWED
|
|
|
|
/*
|
|
* Window overflow and underflow handlers.
|
|
* The handlers must be 64 bytes apart, first starting with the underflow
|
|
* handlers underflow-4 to underflow-12, then the overflow handlers
|
|
* overflow-4 to overflow-12.
|
|
*
|
|
* Note: We rerun the underflow handlers if we hit an exception, so
|
|
* we try to access any page that would cause a page fault early.
|
|
*/
|
|
|
|
.section .WindowVectors.text, "ax"
|
|
|
|
/* 4-Register Window Overflow Vector (Handler) */
|
|
|
|
.align 64
|
|
.global _WindowOverflow4
|
|
_WindowOverflow4:
|
|
s32e a0, a5, -16
|
|
s32e a1, a5, -12
|
|
s32e a2, a5, -8
|
|
s32e a3, a5, -4
|
|
rfwo
|
|
|
|
|
|
/* 4-Register Window Underflow Vector (Handler) */
|
|
|
|
.align 64
|
|
.global _WindowUnderflow4
|
|
_WindowUnderflow4:
|
|
l32e a0, a5, -16
|
|
l32e a1, a5, -12
|
|
l32e a2, a5, -8
|
|
l32e a3, a5, -4
|
|
rfwu
|
|
|
|
/*
|
|
* a0: a0
|
|
* a1: new stack pointer = a1 - 16 - 4
|
|
* a2: available, saved in excsave1
|
|
* a3: available, saved on stack *a1
|
|
*/
|
|
|
|
/* 15*/ .byte 0xff
|
|
|
|
fast_alloca_exception: /* must be at _WindowUnderflow4 + 16 */
|
|
|
|
/* 16*/ rsr a2, PS
|
|
/* 19*/ rsr a3, WINDOWBASE
|
|
/* 22*/ extui a2, a2, PS_OWB_SHIFT, PS_OWB_SHIFT
|
|
/* 25*/ xor a2, a2, a3
|
|
/* 28*/ rsr a3, PS
|
|
/* 31*/ slli a2, a2, PS_OWB_SHIFT
|
|
/* 34*/ xor a2, a3, a2
|
|
/* 37*/ wsr a2, PS
|
|
|
|
/* 40*/ _l32i a3, a1, 0
|
|
/* 43*/ addi a1, a1, 16 + 4
|
|
/* 46*/ rsr a2, EXCSAVE1
|
|
|
|
/* 49*/ rotw -1
|
|
/* 52*/ _bbci.l a4, 31, _WindowUnderflow4 /* 0x: call4 */
|
|
/* 55*/ rotw -1
|
|
/* 58*/ _bbci.l a8, 30, _WindowUnderflow8 /* 10: call8 */
|
|
/* 61*/ _j __WindowUnderflow12 /* 11: call12 */
|
|
/* 64*/
|
|
|
|
/* 8-Register Window Overflow Vector (Handler) */
|
|
|
|
.align 64
|
|
.global _WindowOverflow8
|
|
_WindowOverflow8:
|
|
s32e a0, a9, -16
|
|
l32e a0, a1, -12
|
|
s32e a2, a9, -8
|
|
s32e a1, a9, -12
|
|
s32e a3, a9, -4
|
|
s32e a4, a0, -32
|
|
s32e a5, a0, -28
|
|
s32e a6, a0, -24
|
|
s32e a7, a0, -20
|
|
rfwo
|
|
|
|
/* 8-Register Window Underflow Vector (Handler) */
|
|
|
|
.align 64
|
|
.global _WindowUnderflow8
|
|
_WindowUnderflow8:
|
|
l32e a1, a9, -12
|
|
l32e a0, a9, -16
|
|
l32e a7, a1, -12
|
|
l32e a2, a9, -8
|
|
l32e a4, a7, -32
|
|
l32e a3, a9, -4
|
|
l32e a5, a7, -28
|
|
l32e a6, a7, -24
|
|
l32e a7, a7, -20
|
|
rfwu
|
|
|
|
/* 12-Register Window Overflow Vector (Handler) */
|
|
|
|
.align 64
|
|
.global _WindowOverflow12
|
|
_WindowOverflow12:
|
|
s32e a0, a13, -16
|
|
l32e a0, a1, -12
|
|
s32e a1, a13, -12
|
|
s32e a2, a13, -8
|
|
s32e a3, a13, -4
|
|
s32e a4, a0, -48
|
|
s32e a5, a0, -44
|
|
s32e a6, a0, -40
|
|
s32e a7, a0, -36
|
|
s32e a8, a0, -32
|
|
s32e a9, a0, -28
|
|
s32e a10, a0, -24
|
|
s32e a11, a0, -20
|
|
rfwo
|
|
|
|
/* 12-Register Window Underflow Vector (Handler) */
|
|
|
|
.org _WindowOverflow12 + 64 - 3
|
|
__WindowUnderflow12:
|
|
rotw -1
|
|
.global _WindowUnderflow12
|
|
_WindowUnderflow12:
|
|
l32e a1, a13, -12
|
|
l32e a0, a13, -16
|
|
l32e a11, a1, -12
|
|
l32e a2, a13, -8
|
|
l32e a4, a11, -48
|
|
l32e a8, a11, -32
|
|
l32e a3, a13, -4
|
|
l32e a5, a11, -44
|
|
l32e a6, a11, -40
|
|
l32e a7, a11, -36
|
|
l32e a9, a11, -28
|
|
l32e a10, a11, -24
|
|
l32e a11, a11, -20
|
|
rfwu
|
|
|
|
#endif /* XCHAL_HAVE_WINDOWED */
|