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CRIS v10: Update rescue head.s
- Correct whitespace problems. - Add ifdef for ETRAX_AXISFLASHMAP to avoid compile error when not set.
This commit is contained in:
Jesper Nilsson
parent
63e6b9a0b8
commit
8c11bffae7
@ -1,5 +1,4 @@
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/* $Id: head.S,v 1.7 2005/03/07 12:11:06 starvik Exp $
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*
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/*
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* Rescue code, made to reside at the beginning of the
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* flash-memory. when it starts, it checks a partition
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* table at the first sector after the rescue sector.
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@ -23,20 +22,20 @@
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* Partition table format:
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*
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* Code transparency:
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*
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*
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* 2 bytes [opcode 'nop']
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* 2 bytes [opcode 'di']
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* 4 bytes [opcode 'ba <offset>', 8-bit or 16-bit version]
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* 2 bytes [opcode 'nop', delay slot]
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*
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* Table validation (at +10):
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*
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* Table validation (at +10):
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*
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* 2 bytes [magic/version word for partitiontable - 0xef, 0xbe]
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* 2 bytes [length of all entries plus the end marker]
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* 4 bytes [checksum for the partitiontable itself]
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*
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* Entries, each with the following format, last has offset -1:
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*
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* Entries, each with the following format, last has offset -1:
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*
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* 4 bytes [offset in bytes, from start of flash]
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* 4 bytes [length in bytes of partition]
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* 4 bytes [checksum, simple longword sum]
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@ -47,9 +46,9 @@
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* End marker
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*
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* 4 bytes [-1]
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*
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*
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* 10 bytes [0, padding]
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*
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*
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* Bit 0 in flags signifies RW or RO. The rescue code only bothers
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* to check the checksum for RO partitions, since the others will
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* change their data without updating the checksums. A 1 in bit 0
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@ -59,16 +58,18 @@
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*
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* During the wait for serial input, the status LED will flash so the
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* user knows something went wrong.
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*
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* Copyright (C) 1999, 2000, 2001, 2002, 2003 Axis Communications AB
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*
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* Copyright (C) 1999-2007 Axis Communications AB
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*/
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#ifdef CONFIG_ETRAX_AXISFLASHMAP
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#define ASSEMBLER_MACROS_ONLY
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#include <asm/arch/sv_addr_ag.h>
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;; The partitiontable is looked for at the first sector after the boot
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;; sector. Sector size is 65536 bytes in all flashes we use.
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#define PTABLE_START CONFIG_ETRAX_PTABLE_SECTOR
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#define PTABLE_MAGIC 0xbeef
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@ -78,7 +79,7 @@
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;; having setup the DRAM etc). It is the same length as the on-chip
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;; ROM loads, so the same host loader can be used to load a rescued
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;; product as well as one booted through the Etrax serial boot code.
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#define CODE_START 0x40000000
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#define CODE_LENGTH 784
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@ -102,7 +103,7 @@
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#define SERRECC R_SERIAL2_REC_CTRL
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#define SERRDAT R_SERIAL2_REC_DATA
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#define SERSTAT R_SERIAL2_STATUS
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#endif
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#endif
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#ifdef CONFIG_ETRAX_RESCUE_SER3
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#define SERXOFF R_SERIAL3_XOFF
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#define SERBAUD R_SERIAL3_BAUD
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@ -115,60 +116,61 @@
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#define RAM_INIT_MAGIC 0x56902387
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.text
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;; This is the entry point of the rescue code
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;; 0x80000000 if loaded in flash (as it should be)
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;; since etrax actually starts at address 2 when booting from flash, we
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;; Since etrax actually starts at address 2 when booting from flash, we
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;; put a nop (2 bytes) here first so we dont accidentally skip the di
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nop
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nop
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di
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jump in_cache ; enter cached area instead
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in_cache:
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;; first put a jump test to give a possibility of upgrading the rescue code
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;; without erasing/reflashing the sector. we put a longword of -1 here and if
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;; it is not -1, we jump using the value as jump target. since we can always
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;; change 1's to 0's without erasing the sector, it is possible to add new
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;; First put a jump test to give a possibility of upgrading the
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;; rescue code without erasing/reflashing the sector.
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;; We put a longword of -1 here and if it is not -1, we jump using
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;; the value as jump target. Since we can always change 1's to 0's
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;; without erasing the sector, it is possible to add new
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;; code after this and altering the jumptarget in an upgrade.
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jtcd: move.d [jumptarget], $r0
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cmp.d 0xffffffff, $r0
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beq no_newjump
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nop
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jump [$r0]
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jumptarget:
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jumptarget:
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.dword 0xffffffff ; can be overwritten later to insert new code
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no_newjump:
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#ifdef CONFIG_ETRAX_ETHERNET
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#ifdef CONFIG_ETRAX_ETHERNET
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;; Start MII clock to make sure it is running when tranceiver is reset
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move.d 0x3, $r0 ; enable = on, phy = mii_clk
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move.d $r0, [R_NETWORK_GEN_CONFIG]
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#endif
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;; We need to setup the bus registers before we start using the DRAM
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#include "../../lib/dram_init.S"
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;; we now should go through the checksum-table and check the listed
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;; partitions for errors.
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move.d PTABLE_START, $r3
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move.d [$r3], $r0
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cmp.d NOP_DI, $r0 ; make sure the nop/di is there...
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bne do_rescue
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nop
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;; skip the code transparency block (10 bytes).
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addq 10, $r3
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;; check for correct magic
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move.w [$r3+], $r0
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cmp.w PTABLE_MAGIC, $r0
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bne do_rescue ; didn't recognize - trig rescue
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@ -186,11 +188,11 @@ no_newjump:
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cmp.d $r0, $r4
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bne do_rescue ; didn't match - trig rescue
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nop
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;; ptable is ok. validate each entry.
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moveq -1, $r7
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ploop: move.d [$r3+], $r1 ; partition offset (from ptable start)
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bne notfirst ; check if it is the partition containing ptable
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nop ; yes..
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@ -199,7 +201,7 @@ ploop: move.d [$r3+], $r1 ; partition offset (from ptable start)
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sub.d $r8, $r2 ; minus the ptable length
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ba bosse
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nop
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notfirst:
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notfirst:
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cmp.d -1, $r1 ; the end of the ptable ?
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beq flash_ok ; if so, the flash is validated
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move.d [$r3+], $r2 ; partition length
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@ -213,47 +215,46 @@ bosse: move.d [$r3+], $r5 ; checksum
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bpl 1f
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nop
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move.d $r1, $r7 ; remember boot partition offset
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1:
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1:
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add.d PTABLE_START, $r1
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jsr checksum ; checksum the partition
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cmp.d $r0, $r5
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beq ploop ; checksums matched, go to next entry
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nop
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;; otherwise fall through to the rescue code.
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do_rescue:
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;; setup port PA and PB default initial directions and data
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;; (so we can flash LEDs, and so that DTR and others are set)
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move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR, $r0
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move.b $r0, [R_PORT_PA_DIR]
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move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r0
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move.b $r0, [R_PORT_PA_DATA]
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move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR, $r0
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move.b $r0, [R_PORT_PB_DIR]
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move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r0
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move.b $r0, [R_PORT_PB_DATA]
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;; setup the serial port at 115200 baud
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moveq 0, $r0
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move.d $r0, [SERXOFF]
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move.d $r0, [SERXOFF]
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move.b 0x99, $r0
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move.b $r0, [SERBAUD] ; 115.2kbaud for both transmit and receive
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move.b $r0, [SERBAUD] ; 115.2kbaud for both transmit and receive
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move.b 0x40, $r0 ; rec enable
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move.b $r0, [SERRECC]
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move.b 0x40, $r0 ; rec enable
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move.b $r0, [SERRECC]
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moveq 0, $r1 ; "timer" to clock out a LED red flash
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move.d CODE_START, $r3 ; destination counter
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movu.w CODE_LENGTH, $r4; length
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wait_ser:
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addq 1, $r1
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#ifndef CONFIG_ETRAX_NO_LEDS
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@ -272,20 +273,20 @@ wait_ser:
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nop
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1: not $r0 ; clear bit
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and.d $r0, $r2
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2:
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2:
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#ifdef CONFIG_ETRAX_PA_LEDS
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move.b $r2, [R_PORT_PA_DATA]
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#endif
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move.b $r2, [R_PORT_PA_DATA]
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#endif
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#ifdef CONFIG_ETRAX_PB_LEDS
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move.b $r2, [R_PORT_PB_DATA]
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move.b $r2, [R_PORT_PB_DATA]
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#endif
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#ifdef CONFIG_ETRAX_90000000_LEDS
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move.b $r2, [0x90000000]
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#endif
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#endif
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;; check if we got something on the serial port
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move.b [SERSTAT], $r0
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btstq 0, $r0 ; data_avail
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bpl wait_ser
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@ -295,14 +296,15 @@ wait_ser:
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move.b [SERRDAT], $r0
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move.b $r0, [$r3+]
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subq 1, $r4 ; decrease length
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bne wait_ser
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nop
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;; jump into downloaded code
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move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is initialized
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move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is
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; initialized
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jump CODE_START
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flash_ok:
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@ -313,7 +315,8 @@ flash_ok:
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nop
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move.d PTABLE_START, $r7; otherwise use the ptable start
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1:
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move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is initialized
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move.d RAM_INIT_MAGIC, $r8 ; Tell next product that DRAM is
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; initialized
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jump $r7 ; boot!
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@ -327,7 +330,7 @@ checksum:
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moveq 0, $r0
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moveq CONFIG_ETRAX_FLASH1_SIZE, $r6
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;; If the first physical flash memory is exceeded wrap to the second one.
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;; If the first physical flash memory is exceeded wrap to the second one
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btstq 26, $r1 ; Are we addressing first flash?
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bpl 1f
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nop
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@ -351,3 +354,5 @@ checksum:
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3: move.d MEM_CSE1_START, $r1 ; wrap to second flash
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ba 2b
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nop
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#endif
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