diff options
Diffstat (limited to 'arch/cris/boot/rescue')
| -rw-r--r-- | arch/cris/boot/rescue/Makefile | 53 | ||||
| -rw-r--r-- | arch/cris/boot/rescue/head_v10.S | 358 | ||||
| -rw-r--r-- | arch/cris/boot/rescue/head_v32.S | 27 | ||||
| -rw-r--r-- | arch/cris/boot/rescue/kimagerescue.S | 142 | ||||
| -rw-r--r-- | arch/cris/boot/rescue/rescue_v10.lds | 21 | ||||
| -rw-r--r-- | arch/cris/boot/rescue/rescue_v32.lds | 44 | ||||
| -rw-r--r-- | arch/cris/boot/rescue/testrescue.S | 25 |
7 files changed, 0 insertions, 670 deletions
diff --git a/arch/cris/boot/rescue/Makefile b/arch/cris/boot/rescue/Makefile deleted file mode 100644 index f73ac4c83b96..000000000000 --- a/arch/cris/boot/rescue/Makefile +++ /dev/null @@ -1,53 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for rescue (bootstrap) code -# - -# CC = gcc-cris -mlinux -march=v32 $(LINUXINCLUDE) -# ccflags-$(CONFIG_ETRAX_ARCH_V32) += -I$(srctree)/include/asm/arch/mach/ \ -# -I$(srctree)/include/asm/arch -# asflags-y += -I $(srctree)/include/asm/arch/mach/ -I $(srctree)/include/asm/arch -# LD = gcc-cris -mlinux -march=v32 -nostdlib - -ifdef CONFIG_ETRAX_AXISFLASHMAP - -arch-$(CONFIG_ETRAX_ARCH_V10) = v10 -arch-$(CONFIG_ETRAX_ARCH_V32) = v32 - -ldflags-y += -T $(srctree)/$(src)/rescue_$(arch-y).lds -OBJCOPYFLAGS = -O binary --remove-section=.bss -obj-$(CONFIG_ETRAX_ARCH_V32) = $(obj)/head_v32.o -obj-$(CONFIG_ETRAX_ARCH_V10) = $(obj)/head_v10.o -OBJECTS := $(obj-y) - -targets := rescue.o rescue.bin - -$(obj)/rescue.o: $(OBJECTS) FORCE - $(call if_changed,ld) - -$(obj)/rescue.bin: $(obj)/rescue.o FORCE - $(call if_changed,objcopy) - cp -p $(obj)/rescue.bin $(objtree) - -else -$(obj)/rescue.bin: - -endif - -$(obj)/testrescue.bin: $(obj)/testrescue.o - $(OBJCOPY) $(OBJCOPYFLAGS) $(obj)/testrescue.o tr.bin -# Pad it to 784 bytes - dd if=/dev/zero of=tmp2423 bs=1 count=784 - cat tr.bin tmp2423 >testrescue_tmp.bin - dd if=testrescue_tmp.bin of=$(obj)/testrescue.bin bs=1 count=784 - rm tr.bin tmp2423 testrescue_tmp.bin - - -$(obj)/kimagerescue.bin: $(obj)/kimagerescue.o - $(OBJCOPY) $(OBJCOPYFLAGS) $(obj)/kimagerescue.o ktr.bin -# Pad it to 784 bytes, that's what the rescue loader expects - dd if=/dev/zero of=tmp2423 bs=1 count=784 - cat ktr.bin tmp2423 >kimagerescue_tmp.bin - dd if=kimagerescue_tmp.bin of=$(obj)/kimagerescue.bin bs=1 count=784 - rm ktr.bin tmp2423 kimagerescue_tmp.bin - diff --git a/arch/cris/boot/rescue/head_v10.S b/arch/cris/boot/rescue/head_v10.S deleted file mode 100644 index 11eedb1bf31a..000000000000 --- a/arch/cris/boot/rescue/head_v10.S +++ /dev/null @@ -1,358 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Rescue code, made to reside at the beginning of the - * flash-memory. when it starts, it checks a partition - * table at the first sector after the rescue sector. - * the partition table was generated by the product builder - * script and contains offsets, lengths, types and checksums - * for each partition that this code should check. - * - * If any of the checksums fail, we assume the flash is so - * corrupt that we can't use it to boot into the ftp flash - * loader, and instead we initialize the serial port to - * receive a flash-loader and new flash image. we dont include - * any flash code here, but just accept a certain amount of - * bytes from the serial port and jump into it. the downloaded - * code is put in the cache. - * - * The partitiontable is designed so that it is transparent to - * code execution - it has a relative branch opcode in the - * beginning that jumps over it. each entry contains extra - * data so we can add stuff later. - * - * Partition table format: - * - * Code transparency: - * - * 2 bytes [opcode 'nop'] - * 2 bytes [opcode 'di'] - * 4 bytes [opcode 'ba <offset>', 8-bit or 16-bit version] - * 2 bytes [opcode 'nop', delay slot] - * - * Table validation (at +10): - * - * 2 bytes [magic/version word for partitiontable - 0xef, 0xbe] - * 2 bytes [length of all entries plus the end marker] - * 4 bytes [checksum for the partitiontable itself] - * - * Entries, each with the following format, last has offset -1: - * - * 4 bytes [offset in bytes, from start of flash] - * 4 bytes [length in bytes of partition] - * 4 bytes [checksum, simple longword sum] - * 2 bytes [partition type] - * 2 bytes [flags, only bit 0 used, ro/rw = 1/0] - * 16 bytes [reserved for future use] - * - * End marker - * - * 4 bytes [-1] - * - * 10 bytes [0, padding] - * - * Bit 0 in flags signifies RW or RO. The rescue code only bothers - * to check the checksum for RO partitions, since the others will - * change their data without updating the checksums. A 1 in bit 0 - * means RO, 0 means RW. That way, it is possible to set a partition - * in RO mode initially, and later mark it as RW, since you can always - * write 0's to the flash. - * - * During the wait for serial input, the status LED will flash so the - * user knows something went wrong. - * - * Copyright (C) 1999-2007 Axis Communications AB - */ - -#ifdef CONFIG_ETRAX_AXISFLASHMAP - -#define ASSEMBLER_MACROS_ONLY -#include <arch/sv_addr_ag.h> - - ;; The partitiontable is looked for at the first sector after the boot - ;; sector. Sector size is 65536 bytes in all flashes we use. - -#define PTABLE_START CONFIG_ETRAX_PTABLE_SECTOR -#define PTABLE_MAGIC 0xbeef - - ;; The normal Etrax100 on-chip boot ROM does serial boot at 0x380000f0. - ;; That is not where we put our downloaded serial boot-code. - ;; The length is enough for downloading code that loads the rest - ;; of itself (after having setup the DRAM etc). - ;; It is the same length as the on-chip ROM loads, so the same - ;; host loader can be used to load a rescued product as well as - ;; one booted through the Etrax serial boot code. - -#define CODE_START 0x40000000 -#define CODE_LENGTH 784 - -#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 - -#define NOP_DI 0xf025050f -#define RAM_INIT_MAGIC 0x56902387 - - .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 - - jump in_cache ; enter cached area instead -in_cache: - - - ;; First put a jump test to give a possibility of upgrading the - ;; rescue code without erasing/reflashing the sector. - ;; We put a longword of -1 here and if it is not -1, we jump using - ;; the value as jump target. Since we can always change 1's to 0's - ;; without erasing the sector, it is possible to add new - ;; code after this and altering the jumptarget in an upgrade. - -jtcd: move.d [jumptarget], $r0 - cmp.d 0xffffffff, $r0 - beq no_newjump - nop - - jump [$r0] - -jumptarget: - .dword 0xffffffff ; can be overwritten later to insert new code - -no_newjump: -#ifdef CONFIG_ETRAX_ETHERNET - ;; Start MII clock to make sure it is running when tranceiver is reset - move.d 0x3, $r0 ; enable = on, phy = mii_clk - move.d $r0, [R_NETWORK_GEN_CONFIG] -#endif - - ;; We need to setup the bus registers before we start using the DRAM -#include "../../../arch-v10/lib/dram_init.S" - - ;; we now should go through the checksum-table and check the listed - ;; partitions for errors. - - move.d PTABLE_START, $r3 - move.d [$r3], $r0 - cmp.d NOP_DI, $r0 ; make sure the nop/di is there... - bne do_rescue - nop - - ;; skip the code transparency block (10 bytes). - - addq 10, $r3 - - ;; check for correct magic - - move.w [$r3+], $r0 - cmp.w PTABLE_MAGIC, $r0 - bne do_rescue ; didn't recognize - trig rescue - nop - - ;; check for correct ptable checksum - - movu.w [$r3+], $r2 ; ptable length - move.d $r2, $r8 ; save for later, length of total ptable - addq 28, $r8 ; account for the rest - move.d [$r3+], $r4 ; ptable checksum - move.d $r3, $r1 - jsr checksum ; r1 source, r2 length, returns in r0 - - cmp.d $r0, $r4 - bne do_rescue ; didn't match - trig rescue - nop - - ;; ptable is ok. validate each entry. - - moveq -1, $r7 - -ploop: move.d [$r3+], $r1 ; partition offset (from ptable start) - bne notfirst ; check if it is the partition containing ptable - nop ; yes.. - move.d $r8, $r1 ; for its checksum check, skip the ptable - move.d [$r3+], $r2 ; partition length - sub.d $r8, $r2 ; minus the ptable length - ba bosse - nop -notfirst: - cmp.d -1, $r1 ; the end of the ptable ? - beq flash_ok ; if so, the flash is validated - move.d [$r3+], $r2 ; partition length -bosse: move.d [$r3+], $r5 ; checksum - move.d [$r3+], $r4 ; type and flags - addq 16, $r3 ; skip the reserved bytes - btstq 16, $r4 ; check ro flag - bpl ploop ; rw partition, skip validation - nop - btstq 17, $r4 ; check bootable flag - bpl 1f - nop - move.d $r1, $r7 ; remember boot partition offset -1: - add.d PTABLE_START, $r1 - - jsr checksum ; checksum the partition - - cmp.d $r0, $r5 - beq ploop ; checksums matched, go to next entry - nop - - ;; otherwise fall through to the rescue code. - -do_rescue: - ;; 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] - - ;; 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 - movu.w CODE_LENGTH, $r4; length - -wait_ser: - addq 1, $r1 -#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+] - - subq 1, $r4 ; decrease length - bne wait_ser - nop - - ;; jump into downloaded code - - move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is - ; initialized - jump CODE_START - -flash_ok: - ;; check r7, which contains either -1 or the partition to boot from - - cmp.d -1, $r7 - bne 1f - nop - move.d PTABLE_START, $r7; otherwise use the ptable start -1: - move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is - ; initialized - jump $r7 ; boot! - - - ;; Helper subroutines - - ;; Will checksum by simple addition - ;; r1 - source - ;; r2 - length in bytes - ;; result will be in r0 -checksum: - moveq 0, $r0 - moveq CONFIG_ETRAX_FLASH1_SIZE, $r6 - - ;; If the first physical flash memory is exceeded wrap to the - ;; second one - btstq 26, $r1 ; Are we addressing first flash? - bpl 1f - nop - clear.d $r6 - -1: test.d $r6 ; 0 = no wrapping - beq 2f - nop - lslq 20, $r6 ; Convert MB to bytes - sub.d $r1, $r6 - -2: addu.b [$r1+], $r0 - subq 1, $r6 ; Flash memory left - beq 3f - subq 1, $r2 ; Length left - bne 2b - nop - ret - nop - -3: move.d MEM_CSE1_START, $r1 ; wrap to second flash - ba 2b - nop - -#endif diff --git a/arch/cris/boot/rescue/head_v32.S b/arch/cris/boot/rescue/head_v32.S deleted file mode 100644 index 9eb04abaa0c0..000000000000 --- a/arch/cris/boot/rescue/head_v32.S +++ /dev/null @@ -1,27 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Just get started by jumping to CONFIG_ETRAX_PTABLE_SECTOR to start - * kernel decompressor. - * - * In practice, this only works for NOR flash (or some convoluted RAM boot) - * and hence is not really useful for Artpec-3, so it's Etrax FS / NOR only. - * - */ - -#include <mach/startup.inc> - -#ifdef CONFIG_ETRAX_AXISFLASHMAP - -;; Code - - .text -start: - - ;; Start clocks for used blocks. - START_CLOCKS - - move.d CONFIG_ETRAX_PTABLE_SECTOR, $r10 - jump $r10 ; Jump to decompressor - nop - -#endif 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 diff --git a/arch/cris/boot/rescue/rescue_v10.lds b/arch/cris/boot/rescue/rescue_v10.lds deleted file mode 100644 index e58a53f91728..000000000000 --- a/arch/cris/boot/rescue/rescue_v10.lds +++ /dev/null @@ -1,21 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -MEMORY - { - flash : ORIGIN = 0x00000000, - LENGTH = 0x00100000 - } - -SECTIONS -{ - .text : - { - stext = . ; - *(.text) - etext = . ; - } > flash - .data : - { - *(.data) - edata = . ; - } > flash -} diff --git a/arch/cris/boot/rescue/rescue_v32.lds b/arch/cris/boot/rescue/rescue_v32.lds deleted file mode 100644 index f1542183f263..000000000000 --- a/arch/cris/boot/rescue/rescue_v32.lds +++ /dev/null @@ -1,44 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/*#OUTPUT_FORMAT(elf32-us-cris) */ -OUTPUT_ARCH (crisv32) -/* Now that NAND support has been stripped, this file could be simplified, - * but it doesn't do any harm on the other hand so why bother. */ - -MEMORY - { - bootblk : ORIGIN = 0x38000000, - LENGTH = 0x00004000 - intmem : ORIGIN = 0x38004000, - LENGTH = 0x00005000 - } - -SECTIONS -{ - .text : - { - _stext = . ; - *(.text) - *(.init.text) - *(.rodata) - *(.rodata.*) - _etext = . ; - } > bootblk - .data : - { - *(.data) - _edata = . ; - } > bootblk - .bss : - { - _bss = . ; - *(.bss) - _end = ALIGN( 0x10 ) ; - } > intmem - - /* Get rid of stuff from EXPORT_SYMBOL(foo). */ - /DISCARD/ : - { - *(__ksymtab_strings) - *(__ksymtab) - } -} diff --git a/arch/cris/boot/rescue/testrescue.S b/arch/cris/boot/rescue/testrescue.S deleted file mode 100644 index 06f78a0b0622..000000000000 --- a/arch/cris/boot/rescue/testrescue.S +++ /dev/null @@ -1,25 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Simple testcode to download by the rescue block. - * Just lights some LEDs to show it was downloaded correctly. - * - * Copyright (C) 1999 Axis Communications AB - */ - -#define ASSEMBLER_MACROS_ONLY -#include <arch/sv_addr_ag.h> - - .text - - nop - nop - moveq -1, $r2 - move.b $r2, [R_PORT_PA_DIR] - moveq 0, $r2 - move.b $r2, [R_PORT_PA_DATA] - -endless: - nop - ba endless - nop - |