sh: kfr2r09 board support - zImage flash boot

Commit Message

Magnus Damm July 22, 2009, 4:26 p.m. UTC

From: Magnus Damm <[e-mail]>

This patch adds zImage flash boot support to the kfr2r09 board.

The flash boot code is a Partner Jet script converted into
assembly using macros. If CONFIG_ZIMAGE_BOOT_LOADER is set
then the resulting zImage should be burned to the boot vector
of the CS0 flash.

The Partner Jet script can also be used stand alone with the
Partner Jet JTAG debugger to setup the RAM and allow the zImage
to execute from RAM without burning the zImage to flash.

A simple initramfs based user land is booted in less than a second.

Signed-off-by: Magnus Damm <[e-mail]>
---

 Applies on top of the KEYSC keypad patch.

 arch/sh/Kconfig                                   |    1 
 arch/sh/boards/Kconfig                            |    1 
 arch/sh/boards/mach-kfr2r09/head.S                |   78 ++++++++++++
 arch/sh/boards/mach-kfr2r09/partner-jet-setup.txt |  134 +++++++++++++++++++++
 4 files changed, 214 insertions(+)

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Comments

Nobuhiro Iwamatsu July 23, 2009, 8 a.m. UTC | #1

Hi! Magnus.

On Thu, 23 Jul 2009 01:26:37 +0900
Magnus Damm <[e-mail]> wrote:

> From: Magnus Damm <[e-mail]>
> 
> This patch adds zImage flash boot support to the kfr2r09 board.
> 
> The flash boot code is a Partner Jet script converted into
> assembly using macros. If CONFIG_ZIMAGE_BOOT_LOADER is set
> then the resulting zImage should be burned to the boot vector
> of the CS0 flash.
> 
> The Partner Jet script can also be used stand alone with the
> Partner Jet JTAG debugger to setup the RAM and allow the zImage
> to execute from RAM without burning the zImage to flash.
> 
> A simple initramfs based user land is booted in less than a second.

Is not U-Boot of R2R yet implemented?

Best regards,
 Nobuhiro

Magnus Damm July 23, 2009, 8:44 a.m. UTC | #2

Hi Iwamatsu-san,

On Thu, Jul 23, 2009 at 5:00 PM, Nobuhiro Iwamatsu<[e-mail]> wrote:
> On Thu, 23 Jul 2009 01:26:37 +0900
> Magnus Damm <[e-mail]> wrote:
>> This patch adds zImage flash boot support to the kfr2r09 board.
>
> Is not U-Boot of R2R yet implemented?

I don't know the status of U-Boot on R2R by itself, but last time I
checked U-boot did not have enough hardware support for the kfr2r09
board to boot easily. This board does not have any ethernet
controller. And no USB host.

To easily boot the kfr2r09 board we need USB gadget support with
r8a66597 together with USB ethernet + serial combo gadget driver and
maybe MMC as well. And since we need them under Linux anyway we may as
well reuse our drivers for booting together with kexec.

Cheers,

/ magnus
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Patch

--- 0005/arch/sh/Kconfig
+++ work/arch/sh/Kconfig	2009-07-23 00:51:04.000000000 +0900
@@ -772,6 +772,7 @@  config CMDLINE
 config ZIMAGE_BOOT_LOADER_FILE
 	string
 	depends on ZIMAGE_BOOT_LOADER
+	default "../../boards/mach-kfr2r09/head.S" if SH_KFR2R09
 
 config ZIMAGE_BOOT_LOADER
 	bool "Use zImage as boot loader"
--- 0009/arch/sh/boards/Kconfig
+++ work/arch/sh/boards/Kconfig	2009-07-23 00:51:04.000000000 +0900
@@ -197,6 +197,7 @@  config SH_KFR2R09
 	bool "KFR2R09"
 	depends on CPU_SUBTYPE_SH7724
 	select ARCH_REQUIRE_GPIOLIB
+	select SYS_SUPPORTS_ZIMAGE_BOOT_LOADER
 	help
 	  "Kit For R2R for 2009" support.
 
--- /dev/null
+++ work/arch/sh/boards/mach-kfr2r09/head.S	2009-07-23 00:51:40.000000000 +0900
@@ -0,0 +1,78 @@ 
+/* kfr2r09 board specific boot code:
+ * converts the "partner-jet-script.txt" script into assembly
+ * the assembly code is the first code to be executed in the zImage
+ */
+
+/* The LIST command is used to include comments in the script */
+.macro	LIST comment
+.endm
+
+/* The ED command is used to write a 32-bit word */
+.macro  ED, addr, data
+        mov.l 1f ,r1
+        mov.l 2f ,r0
+        mov.l r0, @r1
+	bra 3f
+	 nop
+	.align 2
+1:	.long \addr
+2:	.long \data
+3:
+.endm
+
+/* The EW command is used to write a 16-bit word */
+.macro  EW, addr, data
+        mov.l 1f ,r1
+        mov.l 2f ,r0
+        mov.w r0, @r1
+	bra 3f
+	 nop
+	.align 2
+1:	.long \addr
+2:	.long \data
+3:
+.endm
+
+/* The EB command is used to write an 8-bit word */
+.macro  EB, addr, data
+        mov.l 1f ,r1
+        mov.l 2f ,r0
+        mov.b r0, @r1
+	bra 3f
+	 nop
+	.align 2
+1:	.long \addr
+2:	.long \data
+3:
+.endm
+
+/* The WAIT command is used to delay the execution */
+.macro  WAIT, time
+        mov.l  2f ,r3
+1:
+        nop
+        tst     r3, r3
+        bf/s    1b
+         dt      r3
+	bra	3f
+	 nop
+	.align 2
+2:	.long \time * 100
+3:
+.endm
+
+/* The DD command is used to read a 32-bit word */
+.macro  DD, addr, addr2, nr
+        mov.l 1f ,r1
+        mov.l @r1, r0
+	bra 2f
+	 nop
+	.align 2
+1:	.long \addr
+2:
+.endm
+
+#include "partner-jet-setup.txt"
+.print "*** CONFIG_ZIMAGE_BOOT_LOADER=y:"
+.print "*** Note: This is a special zImage that should be burned to flash."
+.print "*** For more information please consult the file partner-jet-setup.txt."
--- /dev/null
+++ work/arch/sh/boards/mach-kfr2r09/partner-jet-setup.txt	2009-07-23 00:51:04.000000000 +0900
@@ -0,0 +1,134 @@ 
+LIST "partner-jet-setup.txt - 20090722 Magnus Damm"
+LIST "set up enough of the kfr2r09 hardware to boot the kernel"
+
+LIST "CONFIG_ZIMAGE_BOOT_LOADER=n (RAM boot)"
+LIST "This script can be used to boot the kernel from RAM via JTAG:"
+LIST "> < partner-jet-setup.txt"
+LIST "> RD zImage, 0xa8800000"
+LIST "> G=0xa8800000"
+
+LIST "CONFIG_ZIMAGE_BOOT_LOADER=y (Flash boot)"
+LIST "Use the following command to burn the zImage to flash via JTAG:"
+LIST "> RD zImage, 0"
+
+LIST "--------------------------------"
+
+LIST "disable watchdog"
+EW 0xa4520004, 0xa507
+
+LIST "select mode for cs5 + cs6"
+ED 0xff800020, 0xa5a50001
+ED 0xfec10000, 0x0000001b
+
+LIST "setup clocks"
+ED 0xa4150004, 0x00000050
+ED 0xa4150000, 0x91053508
+WAIT 1
+ED 0xa4150024, 0x00005000
+
+LIST "setup pins"
+EB 0xa4050120, 0x00
+EB 0xa4050122, 0x00
+EB 0xa4050124, 0x00
+EB 0xa4050126, 0x00
+EB 0xa4050128, 0xA0
+EB 0xa405012A, 0x10
+EB 0xa405012C, 0x00
+EB 0xa405012E, 0x00
+EB 0xa4050130, 0x00
+EB 0xa4050132, 0x00
+EB 0xa4050134, 0x01
+EB 0xa4050136, 0x40
+EB 0xa4050138, 0x00
+EB 0xa405013A, 0x00
+EB 0xa405013C, 0x00
+EB 0xa405013E, 0x20
+EB 0xa4050160, 0x00
+EB 0xa4050162, 0x40
+EB 0xa4050164, 0x03
+EB 0xa4050166, 0x00
+EB 0xa4050168, 0x00
+EB 0xa405016A, 0x00
+EB 0xa405016C, 0x00
+
+EW 0xa405014E, 0x5660
+EW 0xa4050150, 0x0145
+EW 0xa4050152, 0x1550
+EW 0xa4050154, 0x0200
+EW 0xa4050156, 0x0040
+
+EW 0xa4050158, 0x0000
+EW 0xa405015a, 0x0000
+EW 0xa405015c, 0x0000
+EW 0xa405015e, 0x0000
+
+EW 0xa4050180, 0x0000
+EW 0xa4050182, 0x8002
+EW 0xa4050184, 0x0000
+
+EW 0xa405018a, 0x9991
+EW 0xa405018c, 0x8011
+EW 0xa405018e, 0x9550
+
+EW 0xa4050100, 0x0000
+EW 0xa4050102, 0x5540
+EW 0xa4050104, 0x0000
+EW 0xa4050106, 0x0000
+EW 0xa4050108, 0x4550
+EW 0xa405010a, 0x0130
+EW 0xa405010c, 0x0555
+EW 0xa405010e, 0x0000
+EW 0xa4050110, 0x0000
+EW 0xa4050112, 0xAAA8
+EW 0xa4050114, 0x8305
+EW 0xa4050116, 0x10F0
+EW 0xa4050118, 0x0F50
+EW 0xa405011a, 0x0000
+EW 0xa405011c, 0x0000
+EW 0xa405011e, 0x0555
+EW 0xa4050140, 0x0000
+EW 0xa4050142, 0x5141
+EW 0xa4050144, 0x5005
+EW 0xa4050146, 0xAAA9
+EW 0xa4050148, 0xFAA9
+EW 0xa405014a, 0x3000
+EW 0xa405014c, 0x0000
+
+LIST "setup sdram"
+ED 0xFD000108, 0x40000301
+ED 0xFD000020, 0x011B0002
+ED 0xFD000030, 0x03060E02
+ED 0xFD000034, 0x01020102
+ED 0xFD000038, 0x01090406
+ED 0xFD000008, 0x00000004
+ED 0xFD000040, 0x00000001
+ED 0xFD000040, 0x00000000
+ED 0xFD000018, 0x00000001
+
+WAIT 1
+
+ED 0xFD000014, 0x00000002
+ED 0xFD000060, 0x00000032
+ED 0xFD000060, 0x00020000
+ED 0xFD000014, 0x00000004
+ED 0xFD000014, 0x00000004
+ED 0xFD000010, 0x00000001
+ED 0xFD000044, 0x000004AF
+ED 0xFD000048, 0x20CF0037
+
+LIST "read 16 bytes from sdram"
+DD 0xa8000000, 0xa8000000, 1
+DD 0xa8000004, 0xa8000004, 1
+DD 0xa8000008, 0xa8000008, 1
+DD 0xa800000c, 0xa800000c, 1
+
+ED 0xFD000014, 0x00000002
+ED 0xFD000014, 0x00000004
+ED 0xFD000108, 0x40000300
+ED 0xFD000040, 0x00010000
+
+LIST "write to internal ram"
+ED 0xfd8007fc, 0
+
+LIST "setup cache"
+ED 0xff00001c, 0x0000090b