diff options
Diffstat (limited to 'arch/cris/arch-v10/kernel/head.S')
| -rw-r--r-- | arch/cris/arch-v10/kernel/head.S | 620 |
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" |