diff options
Diffstat (limited to 'arch/cris/boot/rescue/kimagerescue.S')
-rw-r--r-- | arch/cris/boot/rescue/kimagerescue.S | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/arch/cris/boot/rescue/kimagerescue.S b/arch/cris/boot/rescue/kimagerescue.S deleted file mode 100644 index 3306098dee15..000000000000 --- a/arch/cris/boot/rescue/kimagerescue.S +++ /dev/null @@ -1,142 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Rescue code to be prepended on a kimage and copied to the - * rescue serial port. - * This is called from the rescue code, it will copy received data to - * 4004000 and after a timeout jump to it. - */ - -#define ASSEMBLER_MACROS_ONLY -#include <arch/sv_addr_ag.h> - -#define CODE_START 0x40004000 -#define CODE_LENGTH 784 -#define TIMEOUT_VALUE 1000 - - -#ifdef CONFIG_ETRAX_RESCUE_SER0 -#define SERXOFF R_SERIAL0_XOFF -#define SERBAUD R_SERIAL0_BAUD -#define SERRECC R_SERIAL0_REC_CTRL -#define SERRDAT R_SERIAL0_REC_DATA -#define SERSTAT R_SERIAL0_STATUS -#endif -#ifdef CONFIG_ETRAX_RESCUE_SER1 -#define SERXOFF R_SERIAL1_XOFF -#define SERBAUD R_SERIAL1_BAUD -#define SERRECC R_SERIAL1_REC_CTRL -#define SERRDAT R_SERIAL1_REC_DATA -#define SERSTAT R_SERIAL1_STATUS -#endif -#ifdef CONFIG_ETRAX_RESCUE_SER2 -#define SERXOFF R_SERIAL2_XOFF -#define SERBAUD R_SERIAL2_BAUD -#define SERRECC R_SERIAL2_REC_CTRL -#define SERRDAT R_SERIAL2_REC_DATA -#define SERSTAT R_SERIAL2_STATUS -#endif -#ifdef CONFIG_ETRAX_RESCUE_SER3 -#define SERXOFF R_SERIAL3_XOFF -#define SERBAUD R_SERIAL3_BAUD -#define SERRECC R_SERIAL3_REC_CTRL -#define SERRDAT R_SERIAL3_REC_DATA -#define SERSTAT R_SERIAL3_STATUS -#endif - - .text - ;; This is the entry point of the rescue code - ;; 0x80000000 if loaded in flash (as it should be) - ;; since etrax actually starts at address 2 when booting from flash, we - ;; put a nop (2 bytes) here first so we dont accidentally skip the di - - nop - di - ;; setup port PA and PB default initial directions and data - ;; (so we can flash LEDs, and so that DTR and others are set) - - move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR, $r0 - move.b $r0, [R_PORT_PA_DIR] - move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r0 - move.b $r0, [R_PORT_PA_DATA] - - move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR, $r0 - move.b $r0, [R_PORT_PB_DIR] - move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r0 - move.b $r0, [R_PORT_PB_DATA] - - ;; We need to setup the bus registers before we start using the DRAM -#include "../../lib/dram_init.S" - - ;; Setup the stack to a suitably high address. - ;; We assume 8 MB is the minimum DRAM in an eLinux - ;; product and put the sp at the top for now. - - move.d 0x40800000, $sp - - ;; setup the serial port at 115200 baud - - moveq 0, $r0 - move.d $r0, [SERXOFF] - - move.b 0x99, $r0 - move.b $r0, [SERBAUD] ; 115.2kbaud for both transmit - ; and receive - - move.b 0x40, $r0 ; rec enable - move.b $r0, [SERRECC] - - - moveq 0, $r1 ; "timer" to clock out a LED red flash - move.d CODE_START, $r3 ; destination counter - move.d CODE_LENGTH, $r4 ; length - move.d TIMEOUT_VALUE, $r5 ; "timeout" until jump - -wait_ser: - addq 1, $r1 - subq 1, $r5 ; decrease timeout - beq jump_start ; timed out - nop -#ifndef CONFIG_ETRAX_NO_LEDS -#ifdef CONFIG_ETRAX_PA_LEDS - move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r2 -#endif -#ifdef CONFIG_ETRAX_PB_LEDS - move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r2 -#endif - move.d (1 << CONFIG_ETRAX_LED1R) | (1 << CONFIG_ETRAX_LED2R), $r0 - btstq 16, $r1 - bpl 1f - nop - or.d $r0, $r2 ; set bit - ba 2f - nop -1: not $r0 ; clear bit - and.d $r0, $r2 -2: -#ifdef CONFIG_ETRAX_PA_LEDS - move.b $r2, [R_PORT_PA_DATA] -#endif -#ifdef CONFIG_ETRAX_PB_LEDS - move.b $r2, [R_PORT_PB_DATA] -#endif -#endif - - ;; check if we got something on the serial port - - move.b [SERSTAT], $r0 - btstq 0, $r0 ; data_avail - bpl wait_ser - nop - - ;; got something - copy the byte and loop - - move.b [SERRDAT], $r0 - move.b $r0, [$r3+] - move.d TIMEOUT_VALUE, $r5 ; reset "timeout" - subq 1, $r4 ; decrease length - bne wait_ser - nop -jump_start: - ;; jump into downloaded code - - jump CODE_START |