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u-boot/arch/m68k/cpu/mcf52x2/start.S
Tom Rini 65cc0e2a65 global: Move remaining CONFIG_SYS_* to CFG_SYS_* 
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do
not easily transition to Kconfig. In many cases they likely should come
from the device tree instead. Move these out of CONFIG namespace and in
to CFG namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-12-05 16:06:08 -05:00

333 lines
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
* Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
*/
#include <asm-offsets.h>
#include <config.h>
#include <asm/cache.h>
#define _START _start
#define _FAULT _fault
#define SAVE_ALL \
move.w #0x2700,%sr; /* disable intrs */ \
subl #60,%sp; /* space for 15 regs */ \
moveml %d0-%d7/%a0-%a6,%sp@; \
#define RESTORE_ALL \
moveml %sp@,%d0-%d7/%a0-%a6; \
addl #60,%sp; /* space for 15 regs */ \
rte
/* If we come from a pre-loader we don't need an initial exception
* table.
*/
#if !defined(CONFIG_MONITOR_IS_IN_RAM)
.text
/*
* Vector table. This is used for initial platform startup.
* These vectors are to catch any un-intended traps.
*/
_vectors:
.long 0x00000000 /* Flash offset is 0 until we setup CS0 */
#if defined(CONFIG_M5282) && (CONFIG_TEXT_BASE == CFG_SYS_INT_FLASH_BASE)
.long _start - CONFIG_TEXT_BASE
#else
.long _START
#endif
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
#endif
.text
#if defined(CFG_SYS_INT_FLASH_BASE) && \
(defined(CONFIG_M5282) || defined(CONFIG_M5281))
#if (CONFIG_TEXT_BASE == CFG_SYS_INT_FLASH_BASE)
.long 0x55AA55AA,0xAA55AA55 /* CFM Backdoorkey */
.long 0xFFFFFFFF /* all sectors protected */
.long 0x00000000 /* supervisor/User restriction */
.long 0x00000000 /* programm/data space restriction */
.long 0x00000000 /* Flash security */
#endif
#endif
.globl _start
_start:
nop
nop
move.w #0x2700,%sr
#if defined(CONFIG_M5208)
/* Initialize RAMBAR: locate SRAM and validate it */
move.l #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_RAM_CTRL), %d0
movec %d0, %RAMBAR1
#endif
#if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5253)
/* set MBAR address + valid flag */
move.l #(CFG_SYS_MBAR + 1), %d0
move.c %d0, %MBAR
/*** The 5249 has MBAR2 as well ***/
#ifdef CFG_SYS_MBAR2
/* Get MBAR2 address */
move.l #(CFG_SYS_MBAR2 + 1), %d0
/* Set MBAR2 */
movec %d0, #0xc0e
#endif
move.l #(CFG_SYS_INIT_RAM_ADDR + 1), %d0
movec %d0, %RAMBAR0
#endif /* CONFIG_M5272 || CONFIG_M5249 || CONFIG_M5253 */
#if defined(CONFIG_M5282) || defined(CONFIG_M5271)
/* set MBAR address + valid flag */
move.l #(CFG_SYS_MBAR + 1), %d0
move.l %d0, 0x40000000
/* Initialize RAMBAR1: locate SRAM and validate it */
move.l #(CFG_SYS_INIT_RAM_ADDR + 0x21), %d0
movec %d0, %RAMBAR1
#if defined(CONFIG_M5282)
#if (CONFIG_TEXT_BASE == CFG_SYS_INT_FLASH_BASE)
/*
* Setup code in SRAM to initialize FLASHBAR,
* if start from internal Flash
*/
move.l #(_flashbar_setup-CFG_SYS_INT_FLASH_BASE), %a0
move.l #(_flashbar_setup_end-CFG_SYS_INT_FLASH_BASE), %a1
move.l #(CFG_SYS_INIT_RAM_ADDR), %a2
_copy_flash:
move.l (%a0)+, (%a2)+
cmp.l %a0, %a1
bgt.s _copy_flash
jmp CFG_SYS_INIT_RAM_ADDR
_flashbar_setup:
/* Initialize FLASHBAR: locate internal Flash and validate it */
move.l #(CFG_SYS_INT_FLASH_BASE + CFG_SYS_INT_FLASH_ENABLE), %d0
movec %d0, %FLASHBAR
jmp _after_flashbar_copy.L /* Force jump to absolute address */
_flashbar_setup_end:
nop
_after_flashbar_copy:
#else
/* Setup code to initialize FLASHBAR, if start from external Memory */
move.l #(CFG_SYS_INT_FLASH_BASE + CFG_SYS_INT_FLASH_ENABLE), %d0
movec %d0, %FLASHBAR
#endif /* (CONFIG_TEXT_BASE == CFG_SYS_INT_FLASH_BASE) */
#endif
#endif
/*
* if we come from a pre-loader we have no exception table and
* therefore no VBR to set
*/
#if !defined(CONFIG_MONITOR_IS_IN_RAM)
#if defined(CONFIG_M5282) && (CONFIG_TEXT_BASE == CFG_SYS_INT_FLASH_BASE)
move.l #CFG_SYS_INT_FLASH_BASE, %d0
#else
move.l #CFG_SYS_FLASH_BASE, %d0
#endif
movec %d0, %VBR
#endif
#ifdef CONFIG_M5275
/* set MBAR address + valid flag */
move.l #(CFG_SYS_MBAR + 1), %d0
move.l %d0, 0x40000000
/* movec %d0, %MBAR */
/* Initialize RAMBAR: locate SRAM and validate it */
move.l #(CFG_SYS_INIT_RAM_ADDR + 0x21), %d0
movec %d0, %RAMBAR1
#endif
/* initialize general use internal ram */
move.l #0, %d0
move.l #(ICACHE_STATUS), %a1 /* icache */
move.l #(DCACHE_STATUS), %a2 /* icache */
move.l %d0, (%a1)
move.l %d0, (%a2)
/* put relocation table address to a5 */
move.l #__got_start, %a5
/* setup stack initially on top of internal static ram */
move.l #(CFG_SYS_INIT_RAM_ADDR + CFG_SYS_INIT_RAM_SIZE), %sp
/*
* if configured, malloc_f arena will be reserved first,
* then (and always) gd struct space will be reserved
*/
move.l %sp, -(%sp)
move.l #board_init_f_alloc_reserve, %a1
jsr (%a1)
/* update stack and frame-pointers */
move.l %d0, %sp
move.l %sp, %fp
/* initialize reserved area */
move.l %d0, -(%sp)
move.l #board_init_f_init_reserve, %a1
jsr (%a1)
/* run low-level CPU init code (from flash) */
move.l #cpu_init_f, %a1
jsr (%a1)
/* run low-level board init code (from flash) */
clr.l %sp@-
move.l #board_init_f, %a1
jsr (%a1)
/* board_init_f() does not return */
/******************************************************************************/
/*
* void relocate_code(addr_sp, gd, addr_moni)
*
* This "function" does not return, instead it continues in RAM
* after relocating the monitor code.
*
* r3 = dest
* r4 = src
* r5 = length in bytes
* r6 = cachelinesize
*/
.globl relocate_code
relocate_code:
link.w %a6,#0
move.l 8(%a6), %sp /* set new stack pointer */
move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
move.l 16(%a6), %a0 /* Save copy of Destination Address */
move.l #CONFIG_SYS_MONITOR_BASE, %a1
move.l #__init_end, %a2
move.l %a0, %a3
/* copy the code to RAM */
1:
move.l (%a1)+, (%a3)+
cmp.l %a1,%a2
bgt.s 1b
/*
* We are done. Do not return, instead branch to second part of board
* initialization, now running from RAM.
*/
move.l %a0, %a1
add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
jmp (%a1)
in_ram:
clear_bss:
/*
* Now clear BSS segment
*/
move.l %a0, %a1
add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
move.l %a0, %d1
add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
6:
clr.l (%a1)+
cmp.l %a1,%d1
bgt.s 6b
/*
* fix got table in RAM
*/
move.l %a0, %a1
add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
move.l %a1,%a5 /* fix got pointer register a5 */
move.l %a0, %a2
add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
7:
move.l (%a1),%d1
sub.l #_start,%d1
add.l %a0,%d1
move.l %d1,(%a1)+
cmp.l %a2, %a1
bne 7b
/* calculate relative jump to board_init_r in ram */
move.l %a0, %a1
add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
/* set parameters for board_init_r */
move.l %a0,-(%sp) /* dest_addr */
move.l %d0,-(%sp) /* gd */
jsr (%a1)
/******************************************************************************/
/* exception code */
.globl _fault
_fault:
bra _fault
.globl _exc_handler
_exc_handler:
SAVE_ALL
movel %sp,%sp@-
bsr exc_handler
addql #4,%sp
RESTORE_ALL
.globl _int_handler
_int_handler:
SAVE_ALL
movel %sp,%sp@-
bsr int_handler
addql #4,%sp
RESTORE_ALL
/******************************************************************************/
.align 4
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