mirror of
https://github.com/smaeul/u-boot.git
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
260 lines
6.6 KiB
ArmAsm
260 lines
6.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
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* Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
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*/
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#include <asm-offsets.h>
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#include <config.h>
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#include "version.h"
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#include <asm/cache.h>
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#define _START _start
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#define _FAULT _fault
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#define SAVE_ALL \
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move.w #0x2700,%sr; /* disable intrs */ \
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subl #60,%sp; /* space for 15 regs */ \
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moveml %d0-%d7/%a0-%a6,%sp@;
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#define RESTORE_ALL \
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moveml %sp@,%d0-%d7/%a0-%a6; \
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addl #60,%sp; /* space for 15 regs */ \
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rte;
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.text
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/*
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* Vector table. This is used for initial platform startup.
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* These vectors are to catch any un-intended traps.
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*/
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_vectors:
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INITSP: .long 0x00000000 /* Initial SP */
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INITPC: .long _START /* Initial PC */
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vector02_0F:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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/* Reserved */
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vector10_17:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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vector18_1F:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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/* TRAP #0 - #15 */
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vector20_2F:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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/* Reserved */
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vector30_3F:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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vector64_127:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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vector128_191:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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vector192_255:
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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.text
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.globl _start
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_start:
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nop
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nop
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move.w #0x2700,%sr /* Mask off Interrupt */
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/* Set vector base register at the beginning of the Flash */
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move.l #CONFIG_SYS_FLASH_BASE, %d0
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movec %d0, %VBR
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move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
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movec %d0, %RAMBAR1
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/* invalidate and disable cache */
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move.l #CF_CACR_CINV, %d0 /* Invalidate cache cmd */
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movec %d0, %CACR /* Invalidate cache */
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nop
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move.l #0, %d0
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movec %d0, %ACR0
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movec %d0, %ACR1
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/* initialize general use internal ram */
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move.l #0, %d0
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move.l #(ICACHE_STATUS), %a1 /* icache */
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move.l #(DCACHE_STATUS), %a2 /* icache */
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move.l %d0, (%a1)
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move.l %d0, (%a2)
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/* put relocation table address to a5 */
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move.l #__got_start, %a5
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/* setup stack initially on top of internal static ram */
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move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp
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/*
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* if configured, malloc_f arena will be reserved first,
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* then (and always) gd struct space will be reserved
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*/
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move.l %sp, -(%sp)
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move.l #board_init_f_alloc_reserve, %a1
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jsr (%a1)
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/* update stack and frame-pointers */
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move.l %d0, %sp
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move.l %sp, %fp
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/* initialize reserved area */
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move.l %d0, -(%sp)
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move.l #board_init_f_init_reserve, %a1
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jsr (%a1)
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/* run low-level CPU init code (from flash) */
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move.l #cpu_init_f, %a1
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jsr (%a1)
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/* run low-level board init code (from flash) */
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clr.l %sp@-
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move.l #board_init_f, %a1
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jsr (%a1)
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/* board_init_f() does not return */
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/******************************************************************************/
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/*
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* void relocate_code (addr_sp, gd, addr_moni)
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*
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* This "function" does not return, instead it continues in RAM
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* after relocating the monitor code.
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*
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* r3 = dest
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* r4 = src
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* r5 = length in bytes
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* r6 = cachelinesize
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*/
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.globl relocate_code
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relocate_code:
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link.w %a6,#0
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move.l 8(%a6), %sp /* set new stack pointer */
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move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
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move.l 16(%a6), %a0 /* Save copy of Destination Address */
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move.l #CONFIG_SYS_MONITOR_BASE, %a1
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move.l #__init_end, %a2
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move.l %a0, %a3
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/* copy the code to RAM */
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1:
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move.l (%a1)+, (%a3)+
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cmp.l %a1,%a2
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bgt.s 1b
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/*
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* We are done. Do not return, instead branch to second part of board
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* initialization, now running from RAM.
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*/
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move.l %a0, %a1
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add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
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jmp (%a1)
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in_ram:
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clear_bss:
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/*
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* Now clear BSS segment
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*/
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move.l %a0, %a1
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add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
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move.l %a0, %d1
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add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
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6:
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clr.l (%a1)+
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cmp.l %a1,%d1
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bgt.s 6b
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/*
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* fix got table in RAM
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*/
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move.l %a0, %a1
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add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
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move.l %a1,%a5 /* * fix got pointer register a5 */
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move.l %a0, %a2
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add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
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7:
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move.l (%a1),%d1
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sub.l #_start,%d1
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add.l %a0,%d1
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move.l %d1,(%a1)+
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cmp.l %a2, %a1
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bne 7b
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/* calculate relative jump to board_init_r in ram */
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move.l %a0, %a1
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add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
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/* set parameters for board_init_r */
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move.l %a0,-(%sp) /* dest_addr */
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move.l %d0,-(%sp) /* gd */
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jsr (%a1)
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/******************************************************************************/
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/* exception code */
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.globl _fault
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_fault:
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bra _fault
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.globl _exc_handler
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_exc_handler:
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SAVE_ALL
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movel %sp,%sp@-
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bsr exc_handler
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addql #4,%sp
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RESTORE_ALL
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.globl _int_handler
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_int_handler:
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SAVE_ALL
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movel %sp,%sp@-
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bsr int_handler
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addql #4,%sp
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RESTORE_ALL
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/******************************************************************************/
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.globl version_string
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version_string:
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.ascii U_BOOT_VERSION_STRING, "\0"
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.align 4
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