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-rw-r--r--arch/cris/arch-v10/kernel/head.S620
1 files changed, 0 insertions, 620 deletions
diff --git a/arch/cris/arch-v10/kernel/head.S b/arch/cris/arch-v10/kernel/head.S
deleted file mode 100644
index b260a8833903..000000000000
--- a/arch/cris/arch-v10/kernel/head.S
+++ /dev/null
@@ -1,620 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Head of the kernel - alter with care
- *
- * Copyright (C) 2000, 2001, 2010 Axis Communications AB
- *
- */
-
-#include <linux/init.h>
-
-#define ASSEMBLER_MACROS_ONLY
-/* The IO_* macros use the ## token concatenation operator, so
- -traditional must not be used when assembling this file. */
-#include <arch/sv_addr_ag.h>
-
-#define CRAMFS_MAGIC 0x28cd3d45
-#define RAM_INIT_MAGIC 0x56902387
-#define COMMAND_LINE_MAGIC 0x87109563
-
-#define START_ETHERNET_CLOCK IO_STATE(R_NETWORK_GEN_CONFIG, enable, on) |\
- IO_STATE(R_NETWORK_GEN_CONFIG, phy, mii_clk)
-
- ;; exported symbols
-
- .globl etrax_irv
- .globl romfs_start
- .globl romfs_length
- .globl romfs_in_flash
- .globl swapper_pg_dir
-
- __HEAD
-
- ;; This is the entry point of the kernel. We are in supervisor mode.
- ;; 0x00000000 if Flash, 0x40004000 if DRAM
- ;; 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
- ;;
- ;; NOTICE! The registers r8 and r9 are used as parameters carrying
- ;; information from the decompressor (if the kernel was compressed).
- ;; They should not be used in the code below until read.
-
- nop
- di
-
- ;; First setup the kseg_c mapping from where the kernel is linked
- ;; to 0x40000000 (where the actual DRAM resides) otherwise
- ;; we cannot do very much! See arch/cris/README.mm
- ;;
- ;; Notice that since we're potentially running at 0x00 or 0x40 right now,
- ;; we will get a fault as soon as we enable the MMU if we dont
- ;; temporarily map those segments linearily.
- ;;
- ;; Due to a bug in Etrax-100 LX version 1 we need to map the memory
- ;; slightly different. The bug is that you can't remap bit 31 of
- ;; an address. Though we can check the version register for
- ;; whether the bug is present, some constants would then have to
- ;; be variables, so we don't. The drawback is that you can "only" map
- ;; 1G per process with CONFIG_CRIS_LOW_MAP.
-
-#ifdef CONFIG_CRIS_LOW_MAP
- ; kseg mappings, temporary map of 0xc0->0x40
- move.d IO_FIELD (R_MMU_KBASE_HI, base_c, 4) \
- | IO_FIELD (R_MMU_KBASE_HI, base_b, 0xb) \
- | IO_FIELD (R_MMU_KBASE_HI, base_9, 9) \
- | IO_FIELD (R_MMU_KBASE_HI, base_8, 8), $r0
- move.d $r0, [R_MMU_KBASE_HI]
-
- ; temporary map of 0x40->0x40 and 0x60->0x40
- move.d IO_FIELD (R_MMU_KBASE_LO, base_6, 4) \
- | IO_FIELD (R_MMU_KBASE_LO, base_4, 4), $r0
- move.d $r0, [R_MMU_KBASE_LO]
-
- ; mmu enable, segs e,c,b,a,6,5,4,0 segment mapped
- move.d IO_STATE (R_MMU_CONFIG, mmu_enable, enable) \
- | IO_STATE (R_MMU_CONFIG, inv_excp, enable) \
- | IO_STATE (R_MMU_CONFIG, acc_excp, enable) \
- | IO_STATE (R_MMU_CONFIG, we_excp, enable) \
- | IO_STATE (R_MMU_CONFIG, seg_f, page) \
- | IO_STATE (R_MMU_CONFIG, seg_e, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_d, page) \
- | IO_STATE (R_MMU_CONFIG, seg_c, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_b, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_a, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_9, page) \
- | IO_STATE (R_MMU_CONFIG, seg_8, page) \
- | IO_STATE (R_MMU_CONFIG, seg_7, page) \
- | IO_STATE (R_MMU_CONFIG, seg_6, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_5, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_4, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_3, page) \
- | IO_STATE (R_MMU_CONFIG, seg_2, page) \
- | IO_STATE (R_MMU_CONFIG, seg_1, page) \
- | IO_STATE (R_MMU_CONFIG, seg_0, seg), $r0
- move.d $r0, [R_MMU_CONFIG]
-#else
- ; kseg mappings
- move.d IO_FIELD (R_MMU_KBASE_HI, base_e, 8) \
- | IO_FIELD (R_MMU_KBASE_HI, base_c, 4) \
- | IO_FIELD (R_MMU_KBASE_HI, base_b, 0xb), $r0
- move.d $r0, [R_MMU_KBASE_HI]
-
- ; temporary map of 0x40->0x40 and 0x00->0x00
- move.d IO_FIELD (R_MMU_KBASE_LO, base_4, 4), $r0
- move.d $r0, [R_MMU_KBASE_LO]
-
- ; mmu enable, segs f,e,c,b,4,0 segment mapped
- move.d IO_STATE (R_MMU_CONFIG, mmu_enable, enable) \
- | IO_STATE (R_MMU_CONFIG, inv_excp, enable) \
- | IO_STATE (R_MMU_CONFIG, acc_excp, enable) \
- | IO_STATE (R_MMU_CONFIG, we_excp, enable) \
- | IO_STATE (R_MMU_CONFIG, seg_f, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_e, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_d, page) \
- | IO_STATE (R_MMU_CONFIG, seg_c, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_b, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_a, page) \
- | IO_STATE (R_MMU_CONFIG, seg_9, page) \
- | IO_STATE (R_MMU_CONFIG, seg_8, page) \
- | IO_STATE (R_MMU_CONFIG, seg_7, page) \
- | IO_STATE (R_MMU_CONFIG, seg_6, page) \
- | IO_STATE (R_MMU_CONFIG, seg_5, page) \
- | IO_STATE (R_MMU_CONFIG, seg_4, seg) \
- | IO_STATE (R_MMU_CONFIG, seg_3, page) \
- | IO_STATE (R_MMU_CONFIG, seg_2, page) \
- | IO_STATE (R_MMU_CONFIG, seg_1, page) \
- | IO_STATE (R_MMU_CONFIG, seg_0, seg), $r0
- move.d $r0, [R_MMU_CONFIG]
-#endif
-
- ;; Now we need to sort out the segments and their locations in RAM or
- ;; Flash. The image in the Flash (or in DRAM) consists of 3 pieces:
- ;; 1) kernel text, 2) kernel data, 3) ROM filesystem image
- ;; But the linker has linked the kernel to expect this layout in
- ;; DRAM memory:
- ;; 1) kernel text, 2) kernel data, 3) kernel BSS
- ;; (the location of the ROM filesystem is determined by the krom driver)
- ;; If we boot this from Flash, we want to keep the ROM filesystem in
- ;; the flash, we want to copy the text and need to copy the data to DRAM.
- ;; But if we boot from DRAM, we need to move the ROMFS image
- ;; from its position after kernel data, to after kernel BSS, BEFORE the
- ;; kernel starts using the BSS area (since its "overlayed" with the ROMFS)
- ;;
- ;; In both cases, we start in un-cached mode, and need to jump into a
- ;; cached PC after we're done fiddling around with the segments.
- ;;
- ;; arch/etrax100/etrax100.ld sets some symbols that define the start
- ;; and end of each segment.
-
- ;; Check if we start from DRAM or FLASH by testing PC
-
- move.d $pc,$r0
- and.d 0x7fffffff,$r0 ; get rid of the non-cache bit
- cmp.d 0x10000,$r0 ; arbitrary... just something above this code
- blo _inflash0
- nop
-
- jump _inram ; enter cached ram
-
- ;; Jumpgate for branches.
-_inflash0:
- jump _inflash
-
- ;; Put this in a suitable section where we can reclaim storage
- ;; after init.
- __INIT
-_inflash:
-#ifdef CONFIG_ETRAX_ETHERNET
- ;; Start MII clock to make sure it is running when tranceiver is reset
- move.d START_ETHERNET_CLOCK, $r0
- move.d $r0, [R_NETWORK_GEN_CONFIG]
-#endif
-
- ;; Set up waitstates etc according to kernel configuration.
- move.d CONFIG_ETRAX_DEF_R_WAITSTATES, $r0
- move.d $r0, [R_WAITSTATES]
-
- move.d CONFIG_ETRAX_DEF_R_BUS_CONFIG, $r0
- move.d $r0, [R_BUS_CONFIG]
-
- ;; We need to initialze DRAM registers before we start using the DRAM
-
- cmp.d RAM_INIT_MAGIC, $r8 ; Already initialized?
- beq _dram_init_finished
- nop
-
-#include "../lib/dram_init.S"
-
-_dram_init_finished:
- ;; Copy text+data to DRAM
- ;; This is fragile - the calculation of r4 as the image size depends
- ;; on that the labels below actually are the first and last positions
- ;; in the linker-script.
- ;;
- ;; Then the locating of the cramfs image depends on the aforementioned
- ;; image being located in the flash at 0. This is most often not true,
- ;; thus the following does not work (normally there is a rescue-block
- ;; between the physical start of the flash and the flash-image start,
- ;; and when run with compression, the kernel is actually unpacked to
- ;; DRAM and we never get here in the first place :))
-
- moveq 0, $r0 ; source
- move.d text_start, $r1 ; destination
- move.d __vmlinux_end, $r2 ; end destination
- move.d $r2, $r4
- sub.d $r1, $r4 ; r4=__vmlinux_end in flash, used below
-1: move.w [$r0+], $r3
- move.w $r3, [$r1+]
- cmp.d $r2, $r1
- blo 1b
- nop
-
- ;; We keep the cramfs in the flash.
- ;; There might be none, but that does not matter because
- ;; we don't do anything than read some bytes here.
-
- moveq 0, $r0
- move.d $r0, [romfs_length] ; default if there is no cramfs
-
- move.d [$r4], $r0 ; cramfs_super.magic
- cmp.d CRAMFS_MAGIC, $r0
- bne 1f
- nop
- move.d [$r4 + 4], $r0 ; cramfs_super.size
- move.d $r0, [romfs_length]
-#ifdef CONFIG_CRIS_LOW_MAP
- add.d 0x50000000, $r4 ; add flash start in virtual memory (cached)
-#else
- add.d 0xf0000000, $r4 ; add flash start in virtual memory (cached)
-#endif
- move.d $r4, [romfs_start]
-1:
- moveq 1, $r0
- move.d $r0, [romfs_in_flash]
-
- jump _start_it ; enter code, cached this time
-
-_inram:
- ;; Move the ROM fs to after BSS end. This assumes that the cramfs
- ;; second longword contains the length of the cramfs
-
- moveq 0, $r0
- move.d $r0, [romfs_length] ; default if there is no cramfs
-
- ;; The kernel could have been unpacked to DRAM by the loader, but
- ;; the cramfs image could still be in the Flash directly after the
- ;; compressed kernel image. The loader passes the address of the
- ;; byte succeeding the last compressed byte in the flash in the
- ;; register r9 when starting the kernel. Check if r9 points to a
- ;; decent cramfs image!
- ;; (Notice that if this is not booted from the loader, r9 will be
- ;; garbage but we do sanity checks on it, the chance that it points
- ;; to a cramfs magic is small.. )
-
- cmp.d 0x0ffffff8, $r9
- bhs _no_romfs_in_flash ; r9 points outside the flash area
- nop
- move.d [$r9], $r0 ; cramfs_super.magic
- cmp.d CRAMFS_MAGIC, $r0
- bne _no_romfs_in_flash
- nop
- move.d [$r9+4], $r0 ; cramfs_super.length
- move.d $r0, [romfs_length]
-#ifdef CONFIG_CRIS_LOW_MAP
- add.d 0x50000000, $r9 ; add flash start in virtual memory (cached)
-#else
- add.d 0xf0000000, $r9 ; add flash start in virtual memory (cached)
-#endif
- move.d $r9, [romfs_start]
-
- moveq 1, $r0
- move.d $r0, [romfs_in_flash]
-
- jump _start_it ; enter code, cached this time
-
-_no_romfs_in_flash:
-
- ;; Check if there is a cramfs (magic value).
- ;; Notice that we check for cramfs magic value - which is
- ;; the "rom fs" we'll possibly use in 2.4 if not JFFS (which does
- ;; not need this mechanism anyway)
-
- move.d __init_end, $r0; the image will be after the end of init
- move.d [$r0], $r1 ; cramfs assumes same endian on host/target
- cmp.d CRAMFS_MAGIC, $r1; magic value in cramfs superblock
- bne 2f
- nop
-
- ;; Ok. What is its size ?
-
- move.d [$r0 + 4], $r2 ; cramfs_super.size (again, no need to swapwb)
-
- ;; We want to copy it to the end of the BSS
-
- move.d _end, $r1
-
- ;; Remember values so cramfs and setup can find this info
-
- move.d $r1, [romfs_start] ; new romfs location
- move.d $r2, [romfs_length]
-
- ;; We need to copy it backwards, since they can be overlapping
-
- add.d $r2, $r0
- add.d $r2, $r1
-
- ;; Go ahead. Make my loop.
-
- lsrq 1, $r2 ; size is in bytes, we copy words
-
-1: move.w [$r0=$r0-2],$r3
- move.w $r3,[$r1=$r1-2]
- subq 1, $r2
- bne 1b
- nop
-
-2:
- ;; Dont worry that the BSS is tainted. It will be cleared later.
-
- moveq 0, $r0
- move.d $r0, [romfs_in_flash]
-
- jump _start_it ; better skip the additional cramfs check below
-
-_start_it:
-
- ;; Check if kernel command line is supplied
- cmp.d COMMAND_LINE_MAGIC, $r10
- bne no_command_line
- nop
-
- move.d 256, $r13
- move.d cris_command_line, $r10
- or.d 0x80000000, $r11 ; Make it virtual
-1:
- move.b [$r11+], $r12
- move.b $r12, [$r10+]
- subq 1, $r13
- bne 1b
- nop
-
-no_command_line:
-
- ;; the kernel stack is overlayed with the task structure for each
- ;; task. thus the initial kernel stack is in the same page as the
- ;; init_task (but starts in the top of the page, size 8192)
- move.d init_thread_union + 8192, $sp
- move.d ibr_start,$r0 ; this symbol is set by the linker script
- move $r0,$ibr
- move.d $r0,[etrax_irv] ; set the interrupt base register and pointer
-
- ;; Clear BSS region, from _bss_start to _end
-
- move.d __bss_start, $r0
- move.d _end, $r1
-1: clear.d [$r0+]
- cmp.d $r1, $r0
- blo 1b
- nop
-
- ;; Etrax product HW genconfig setup
-
- moveq 0,$r0
-
- ;; Select or disable serial port 2
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
- or.d IO_STATE (R_GEN_CONFIG, ser2, select),$r0
-#else
- or.d IO_STATE (R_GEN_CONFIG, ser2, disable),$r0
-#endif
-
- ;; Init interfaces (disable them).
- or.d IO_STATE (R_GEN_CONFIG, scsi0, disable) \
- | IO_STATE (R_GEN_CONFIG, ata, disable) \
- | IO_STATE (R_GEN_CONFIG, par0, disable) \
- | IO_STATE (R_GEN_CONFIG, mio, disable) \
- | IO_STATE (R_GEN_CONFIG, scsi1, disable) \
- | IO_STATE (R_GEN_CONFIG, scsi0w, disable) \
- | IO_STATE (R_GEN_CONFIG, par1, disable) \
- | IO_STATE (R_GEN_CONFIG, ser3, disable) \
- | IO_STATE (R_GEN_CONFIG, mio_w, disable) \
- | IO_STATE (R_GEN_CONFIG, usb1, disable) \
- | IO_STATE (R_GEN_CONFIG, usb2, disable) \
- | IO_STATE (R_GEN_CONFIG, par_w, disable),$r0
-
- ;; Init DMA channel muxing (set to unused clients).
- or.d IO_STATE (R_GEN_CONFIG, dma2, ata) \
- | IO_STATE (R_GEN_CONFIG, dma3, ata) \
- | IO_STATE (R_GEN_CONFIG, dma4, scsi1) \
- | IO_STATE (R_GEN_CONFIG, dma5, scsi1) \
- | IO_STATE (R_GEN_CONFIG, dma6, unused) \
- | IO_STATE (R_GEN_CONFIG, dma7, unused) \
- | IO_STATE (R_GEN_CONFIG, dma8, usb) \
- | IO_STATE (R_GEN_CONFIG, dma9, usb),$r0
-
-
- move.d $r0,[genconfig_shadow] ; init a shadow register of R_GEN_CONFIG
-
- move.d $r0,[R_GEN_CONFIG]
-
-#if 0
- moveq 4,$r0
- move.b $r0,[R_DMA_CH6_CMD] ; reset (ser0 dma out)
- move.b $r0,[R_DMA_CH7_CMD] ; reset (ser0 dma in)
-1: move.b [R_DMA_CH6_CMD],$r0 ; wait for reset cycle to finish
- and.b 7,$r0
- cmp.b 4,$r0
- beq 1b
- nop
-1: move.b [R_DMA_CH7_CMD],$r0 ; wait for reset cycle to finish
- and.b 7,$r0
- cmp.b 4,$r0
- beq 1b
- nop
-#endif
-
- moveq IO_STATE (R_DMA_CH8_CMD, cmd, reset),$r0
- move.b $r0,[R_DMA_CH8_CMD] ; reset (ser1 dma out)
- move.b $r0,[R_DMA_CH9_CMD] ; reset (ser1 dma in)
-1: move.b [R_DMA_CH8_CMD],$r0 ; wait for reset cycle to finish
- andq IO_MASK (R_DMA_CH8_CMD, cmd),$r0
- cmpq IO_STATE (R_DMA_CH8_CMD, cmd, reset),$r0
- beq 1b
- nop
-1: move.b [R_DMA_CH9_CMD],$r0 ; wait for reset cycle to finish
- andq IO_MASK (R_DMA_CH9_CMD, cmd),$r0
- cmpq IO_STATE (R_DMA_CH9_CMD, cmd, reset),$r0
- beq 1b
- nop
-
- ;; setup port PA and PB default initial directions and data
- ;; including their shadow registers
-
- move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR,$r0
- move.b $r0,[port_pa_dir_shadow]
- move.b $r0,[R_PORT_PA_DIR]
- move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA,$r0
- move.b $r0,[port_pa_data_shadow]
- move.b $r0,[R_PORT_PA_DATA]
-
- move.b CONFIG_ETRAX_DEF_R_PORT_PB_CONFIG,$r0
- move.b $r0,[port_pb_config_shadow]
- move.b $r0,[R_PORT_PB_CONFIG]
- move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR,$r0
- move.b $r0,[port_pb_dir_shadow]
- move.b $r0,[R_PORT_PB_DIR]
- move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA,$r0
- move.b $r0,[port_pb_data_shadow]
- move.b $r0,[R_PORT_PB_DATA]
-
- moveq 0, $r0
- move.d $r0,[port_pb_i2c_shadow]
- move.d $r0, [R_PORT_PB_I2C]
-
- moveq 0,$r0
- move.d $r0,[port_g_data_shadow]
- move.d $r0,[R_PORT_G_DATA]
-
- ;; setup the serial port 0 at 115200 baud for debug purposes
-
- moveq IO_STATE (R_SERIAL0_XOFF, tx_stop, enable) \
- | IO_STATE (R_SERIAL0_XOFF, auto_xoff, disable) \
- | IO_FIELD (R_SERIAL0_XOFF, xoff_char, 0),$r0
- move.d $r0,[R_SERIAL0_XOFF]
-
- ; 115.2kbaud for both transmit and receive
- move.b IO_STATE (R_SERIAL0_BAUD, tr_baud, c115k2Hz) \
- | IO_STATE (R_SERIAL0_BAUD, rec_baud, c115k2Hz),$r0
- move.b $r0,[R_SERIAL0_BAUD]
-
- ; Set up and enable the serial0 receiver.
- move.b IO_STATE (R_SERIAL0_REC_CTRL, dma_err, stop) \
- | IO_STATE (R_SERIAL0_REC_CTRL, rec_enable, enable) \
- | IO_STATE (R_SERIAL0_REC_CTRL, rts_, active) \
- | IO_STATE (R_SERIAL0_REC_CTRL, sampling, middle) \
- | IO_STATE (R_SERIAL0_REC_CTRL, rec_stick_par, normal) \
- | IO_STATE (R_SERIAL0_REC_CTRL, rec_par, even) \
- | IO_STATE (R_SERIAL0_REC_CTRL, rec_par_en, disable) \
- | IO_STATE (R_SERIAL0_REC_CTRL, rec_bitnr, rec_8bit),$r0
- move.b $r0,[R_SERIAL0_REC_CTRL]
-
- ; Set up and enable the serial0 transmitter.
- move.b IO_FIELD (R_SERIAL0_TR_CTRL, txd, 0) \
- | IO_STATE (R_SERIAL0_TR_CTRL, tr_enable, enable) \
- | IO_STATE (R_SERIAL0_TR_CTRL, auto_cts, disabled) \
- | IO_STATE (R_SERIAL0_TR_CTRL, stop_bits, one_bit) \
- | IO_STATE (R_SERIAL0_TR_CTRL, tr_stick_par, normal) \
- | IO_STATE (R_SERIAL0_TR_CTRL, tr_par, even) \
- | IO_STATE (R_SERIAL0_TR_CTRL, tr_par_en, disable) \
- | IO_STATE (R_SERIAL0_TR_CTRL, tr_bitnr, tr_8bit),$r0
- move.b $r0,[R_SERIAL0_TR_CTRL]
-
- ;; setup the serial port 1 at 115200 baud for debug purposes
-
- moveq IO_STATE (R_SERIAL1_XOFF, tx_stop, enable) \
- | IO_STATE (R_SERIAL1_XOFF, auto_xoff, disable) \
- | IO_FIELD (R_SERIAL1_XOFF, xoff_char, 0),$r0
- move.d $r0,[R_SERIAL1_XOFF]
-
- ; 115.2kbaud for both transmit and receive
- move.b IO_STATE (R_SERIAL1_BAUD, tr_baud, c115k2Hz) \
- | IO_STATE (R_SERIAL1_BAUD, rec_baud, c115k2Hz),$r0
- move.b $r0,[R_SERIAL1_BAUD]
-
- ; Set up and enable the serial1 receiver.
- move.b IO_STATE (R_SERIAL1_REC_CTRL, dma_err, stop) \
- | IO_STATE (R_SERIAL1_REC_CTRL, rec_enable, enable) \
- | IO_STATE (R_SERIAL1_REC_CTRL, rts_, active) \
- | IO_STATE (R_SERIAL1_REC_CTRL, sampling, middle) \
- | IO_STATE (R_SERIAL1_REC_CTRL, rec_stick_par, normal) \
- | IO_STATE (R_SERIAL1_REC_CTRL, rec_par, even) \
- | IO_STATE (R_SERIAL1_REC_CTRL, rec_par_en, disable) \
- | IO_STATE (R_SERIAL1_REC_CTRL, rec_bitnr, rec_8bit),$r0
- move.b $r0,[R_SERIAL1_REC_CTRL]
-
- ; Set up and enable the serial1 transmitter.
- move.b IO_FIELD (R_SERIAL1_TR_CTRL, txd, 0) \
- | IO_STATE (R_SERIAL1_TR_CTRL, tr_enable, enable) \
- | IO_STATE (R_SERIAL1_TR_CTRL, auto_cts, disabled) \
- | IO_STATE (R_SERIAL1_TR_CTRL, stop_bits, one_bit) \
- | IO_STATE (R_SERIAL1_TR_CTRL, tr_stick_par, normal) \
- | IO_STATE (R_SERIAL1_TR_CTRL, tr_par, even) \
- | IO_STATE (R_SERIAL1_TR_CTRL, tr_par_en, disable) \
- | IO_STATE (R_SERIAL1_TR_CTRL, tr_bitnr, tr_8bit),$r0
- move.b $r0,[R_SERIAL1_TR_CTRL]
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
- ;; setup the serial port 2 at 115200 baud for debug purposes
-
- moveq IO_STATE (R_SERIAL2_XOFF, tx_stop, enable) \
- | IO_STATE (R_SERIAL2_XOFF, auto_xoff, disable) \
- | IO_FIELD (R_SERIAL2_XOFF, xoff_char, 0),$r0
- move.d $r0,[R_SERIAL2_XOFF]
-
- ; 115.2kbaud for both transmit and receive
- move.b IO_STATE (R_SERIAL2_BAUD, tr_baud, c115k2Hz) \
- | IO_STATE (R_SERIAL2_BAUD, rec_baud, c115k2Hz),$r0
- move.b $r0,[R_SERIAL2_BAUD]
-
- ; Set up and enable the serial2 receiver.
- move.b IO_STATE (R_SERIAL2_REC_CTRL, dma_err, stop) \
- | IO_STATE (R_SERIAL2_REC_CTRL, rec_enable, enable) \
- | IO_STATE (R_SERIAL2_REC_CTRL, rts_, active) \
- | IO_STATE (R_SERIAL2_REC_CTRL, sampling, middle) \
- | IO_STATE (R_SERIAL2_REC_CTRL, rec_stick_par, normal) \
- | IO_STATE (R_SERIAL2_REC_CTRL, rec_par, even) \
- | IO_STATE (R_SERIAL2_REC_CTRL, rec_par_en, disable) \
- | IO_STATE (R_SERIAL2_REC_CTRL, rec_bitnr, rec_8bit),$r0
- move.b $r0,[R_SERIAL2_REC_CTRL]
-
- ; Set up and enable the serial2 transmitter.
- move.b IO_FIELD (R_SERIAL2_TR_CTRL, txd, 0) \
- | IO_STATE (R_SERIAL2_TR_CTRL, tr_enable, enable) \
- | IO_STATE (R_SERIAL2_TR_CTRL, auto_cts, disabled) \
- | IO_STATE (R_SERIAL2_TR_CTRL, stop_bits, one_bit) \
- | IO_STATE (R_SERIAL2_TR_CTRL, tr_stick_par, normal) \
- | IO_STATE (R_SERIAL2_TR_CTRL, tr_par, even) \
- | IO_STATE (R_SERIAL2_TR_CTRL, tr_par_en, disable) \
- | IO_STATE (R_SERIAL2_TR_CTRL, tr_bitnr, tr_8bit),$r0
- move.b $r0,[R_SERIAL2_TR_CTRL]
-#endif
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
- ;; setup the serial port 3 at 115200 baud for debug purposes
-
- moveq IO_STATE (R_SERIAL3_XOFF, tx_stop, enable) \
- | IO_STATE (R_SERIAL3_XOFF, auto_xoff, disable) \
- | IO_FIELD (R_SERIAL3_XOFF, xoff_char, 0),$r0
- move.d $r0,[R_SERIAL3_XOFF]
-
- ; 115.2kbaud for both transmit and receive
- move.b IO_STATE (R_SERIAL3_BAUD, tr_baud, c115k2Hz) \
- | IO_STATE (R_SERIAL3_BAUD, rec_baud, c115k2Hz),$r0
- move.b $r0,[R_SERIAL3_BAUD]
-
- ; Set up and enable the serial3 receiver.
- move.b IO_STATE (R_SERIAL3_REC_CTRL, dma_err, stop) \
- | IO_STATE (R_SERIAL3_REC_CTRL, rec_enable, enable) \
- | IO_STATE (R_SERIAL3_REC_CTRL, rts_, active) \
- | IO_STATE (R_SERIAL3_REC_CTRL, sampling, middle) \
- | IO_STATE (R_SERIAL3_REC_CTRL, rec_stick_par, normal) \
- | IO_STATE (R_SERIAL3_REC_CTRL, rec_par, even) \
- | IO_STATE (R_SERIAL3_REC_CTRL, rec_par_en, disable) \
- | IO_STATE (R_SERIAL3_REC_CTRL, rec_bitnr, rec_8bit),$r0
- move.b $r0,[R_SERIAL3_REC_CTRL]
-
- ; Set up and enable the serial3 transmitter.
- move.b IO_FIELD (R_SERIAL3_TR_CTRL, txd, 0) \
- | IO_STATE (R_SERIAL3_TR_CTRL, tr_enable, enable) \
- | IO_STATE (R_SERIAL3_TR_CTRL, auto_cts, disabled) \
- | IO_STATE (R_SERIAL3_TR_CTRL, stop_bits, one_bit) \
- | IO_STATE (R_SERIAL3_TR_CTRL, tr_stick_par, normal) \
- | IO_STATE (R_SERIAL3_TR_CTRL, tr_par, even) \
- | IO_STATE (R_SERIAL3_TR_CTRL, tr_par_en, disable) \
- | IO_STATE (R_SERIAL3_TR_CTRL, tr_bitnr, tr_8bit),$r0
- move.b $r0,[R_SERIAL3_TR_CTRL]
-#endif
-
- jump start_kernel ; jump into the C-function start_kernel in init/main.c
-
- .data
-etrax_irv:
- .dword 0
-romfs_start:
- .dword 0
-romfs_length:
- .dword 0
-romfs_in_flash:
- .dword 0
-
- ;; put some special pages at the beginning of the kernel aligned
- ;; to page boundaries - the kernel cannot start until after this
-
-#ifdef CONFIG_CRIS_LOW_MAP
-swapper_pg_dir = 0x60002000
-#else
-swapper_pg_dir = 0xc0002000
-#endif
-
- .section ".init.data", "aw"
-#include "../lib/hw_settings.S"