-/* $Id: head.S,v 1.6 2003/04/28 05:31:46 starvik Exp $
+/* $Id: head.S,v 1.10 2005/06/20 05:12:54 starvik Exp $
*
* Head of the kernel - alter with care
*
* Authors: Bjorn Wesen (bjornw@axis.com)
*
* $Log: head.S,v $
+ * Revision 1.10 2005/06/20 05:12:54 starvik
+ * Remove unnecessary diff to kernel.org tree
+ *
+ * Revision 1.9 2004/12/13 12:21:51 starvik
+ * Added I/O and DMA allocators from Linux 2.4
+ *
+ * Revision 1.8 2004/11/22 11:41:14 starvik
+ * Kernel command line may be supplied to kernel. Not used by Axis but may
+ * be used by customers.
+ *
+ * Revision 1.7 2004/05/14 07:58:01 starvik
+ * Merge of changes from 2.4
+ *
* Revision 1.6 2003/04/28 05:31:46 starvik
* Added section attributes
*
*
*/
-#include <linux/config.h>
#define ASSEMBLER_MACROS_ONLY
/* The IO_* macros use the ## token concatenation operator, so
-traditional must not be used when assembling this file. */
#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)
move.d START_ETHERNET_CLOCK, $r0
move.d $r0, [R_NETWORK_GEN_CONFIG]
#endif
-
+
+ ;; Set up waitstates etc according to kernel configuration.
+#ifndef CONFIG_SVINTO_SIM
+ 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]
+#endif
+
;; We need to initialze DRAM registers before we start using the DRAM
cmp.d RAM_INIT_MAGIC, $r8 ; Already initialized?
_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, $r13
+ bne 1b
+ nop
+
+no_command_line:
+
;; the kernel stack is overlayed with the task structure for each
;; task. thus the initial kernel stack is in the same page as the
;; init_task (but starts in the top of the page, size 8192)
;; Etrax product HW genconfig setup
moveq 0,$r0
-#if (!defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT0)) \
- && !defined(CONFIG_DMA_MEMCPY)
- ; DMA channels 6 and 7 to ser0, kgdb doesnt want DMA
- or.d IO_STATE (R_GEN_CONFIG, dma7, serial0) \
- | IO_STATE (R_GEN_CONFIG, dma6, serial0),$r0
-#endif
-#if !defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT1)
- ; DMA channels 8 and 9 to ser1, kgdb doesnt want DMA
- or.d IO_STATE (R_GEN_CONFIG, dma9, serial1) \
- | IO_STATE (R_GEN_CONFIG, dma8, serial1),$r0
-#endif
-#ifdef CONFIG_DMA_MEMCPY
- ; 6/7 memory-memory DMA
- or.d IO_STATE (R_GEN_CONFIG, dma7, intdma6) \
- | IO_STATE (R_GEN_CONFIG, dma6, intdma7),$r0
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
- ; Enable serial port 2
- or.w IO_STATE (R_GEN_CONFIG, ser2, select),$r0
-#if !defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT2)
- ; DMA channels 2 and 3 to ser2, kgdb doesnt want DMA
- or.d IO_STATE (R_GEN_CONFIG, dma3, serial2) \
- | IO_STATE (R_GEN_CONFIG, dma2, serial2),$r0
-#endif
-#endif
-#if defined(CONFIG_ETRAX_SERIAL_PORT3) || defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL_PORT1)
- ; Enable serial port 3
- or.w IO_STATE (R_GEN_CONFIG, ser3, select),$r0
-#if !defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT3)
- ; DMA channels 4 and 5 to ser3, kgdb doesnt want DMA
- or.d IO_STATE (R_GEN_CONFIG, dma5, serial3) \
- | IO_STATE (R_GEN_CONFIG, dma4, serial3),$r0
-#endif
-#endif
-#if defined(CONFIG_ETRAX_PARALLEL_PORT0) || defined(CONFIG_ETRAX_ETHERNET_LPSLAVE)
- ; parport 0 enabled using DMA 2/3
- or.w IO_STATE (R_GEN_CONFIG, par0, select),$r0
-#endif
-#if defined(CONFIG_ETRAX_PARALLEL_PORT1) || defined(CONFIG_ETRAX_ETHERNET_LPSLAVE)
- ; parport 1 enabled using DMA 4/5
- or.w IO_STATE (R_GEN_CONFIG, par1, select),$r0
-#endif
-#ifdef CONFIG_ETRAX_IDE
- ; DMA channels 2 and 3 to ATA, ATA enabled
- or.d IO_STATE (R_GEN_CONFIG, dma3, ata) \
- | IO_STATE (R_GEN_CONFIG, dma2, ata) \
- | IO_STATE (R_GEN_CONFIG, ata, select),$r0
-#endif
-
-#ifdef CONFIG_ETRAX_USB_HOST_PORT1
- ; Set the USB port 1 enable bit
- or.d IO_STATE (R_GEN_CONFIG, usb1, select),$r0
-#endif
-#ifdef CONFIG_ETRAX_USB_HOST_PORT2
- ; Set the USB port 2 enable bit
- or.d IO_STATE (R_GEN_CONFIG, usb2, select),$r0
-#endif
-#ifdef CONFIG_ETRAX_USB_HOST
- ; Connect DMA channels 8 and 9 to USB
- and.d (~(IO_MASK (R_GEN_CONFIG, dma9) \
- | IO_MASK (R_GEN_CONFIG, dma8))) \
- | IO_STATE (R_GEN_CONFIG, dma9, usb) \
- | IO_STATE (R_GEN_CONFIG, dma8, usb),$r0
-#endif
-
-#ifdef CONFIG_JULIETTE
- ; DMA channels 4 and 5 to EXTDMA0, for Juliette
- or.d IO_STATE (R_GEN_CONFIG, dma5, extdma0) \
- | IO_STATE (R_GEN_CONFIG, dma4, extdma0),$r0
-#endif
-#if defined(CONFIG_BLUETOOTH) && (defined(CONFIG_BLUETOOTH_RESET_G10) || defined(CONFIG_BLUETOOTH_RESET_G11))
- or.d IO_STATE (R_GEN_CONFIG, g8_15dir, out),$r0
+ ;; Init interfaces (disable them).
+ or.d IO_STATE (R_GEN_CONFIG, scsi0, disable) \
+ | IO_STATE (R_GEN_CONFIG, ata, disable) \
+ | IO_STATE (R_GEN_CONFIG, par0, disable) \
+ | IO_STATE (R_GEN_CONFIG, ser2, disable) \
+ | IO_STATE (R_GEN_CONFIG, mio, disable) \
+ | IO_STATE (R_GEN_CONFIG, scsi1, disable) \
+ | IO_STATE (R_GEN_CONFIG, scsi0w, disable) \
+ | IO_STATE (R_GEN_CONFIG, par1, disable) \
+ | IO_STATE (R_GEN_CONFIG, ser3, disable) \
+ | IO_STATE (R_GEN_CONFIG, mio_w, disable) \
+ | IO_STATE (R_GEN_CONFIG, usb1, disable) \
+ | IO_STATE (R_GEN_CONFIG, usb2, disable) \
+ | IO_STATE (R_GEN_CONFIG, par_w, disable),$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),$r0
+
+
+#if defined(CONFIG_ETRAX_DEF_R_PORT_G0_DIR_OUT)
+ or.d IO_STATE (R_GEN_CONFIG, g0dir, out),$r0
+#endif
+
+#if defined(CONFIG_ETRAX_DEF_R_PORT_G8_15_DIR_OUT)
+ or.d IO_STATE (R_GEN_CONFIG, g8_15dir, out),$r0
+#endif
+#if defined(CONFIG_ETRAX_DEF_R_PORT_G16_23_DIR_OUT)
+ or.d IO_STATE (R_GEN_CONFIG, g16_23dir, out),$r0
+#endif
+
+#if defined(CONFIG_ETRAX_DEF_R_PORT_G24_DIR_OUT)
+ or.d IO_STATE (R_GEN_CONFIG, g24dir, out),$r0
#endif
move.d $r0,[genconfig_shadow] ; init a shadow register of R_GEN_CONFIG
git://git.onelab.eu / linux-2.6.git / blobdiff