default "0x00010000" if PAGE_SIZE_64KB
default "0x00000000"
+config ROMIMAGE_MMCIF
+ bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
+ depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
+ help
+ Say Y here to include experimental MMCIF loading code in
+ romImage. With this enabled it is possible to write the romImage
+ kernel image to an MMC card and boot the kernel straight from
+ the reset vector. At reset the processor Mask ROM will load the
+ first part of the romImage which in turn loads the rest the kernel
+ image to RAM using the MMCIF hardware block.
+
choice
prompt "Kernel command line"
optional
#
# linux/arch/sh/boot/romimage/Makefile
#
-# create an image suitable for burning to flash from zImage
+# create an romImage file suitable for burning to flash/mmc from zImage
#
targets := vmlinux head.o zeropage.bin piggy.o
+load-y := 0
-OBJECTS = $(obj)/head.o
-LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext 0 -e romstart \
+mmcif-load-$(CONFIG_CPU_SUBTYPE_SH7724) := 0xe5200000 # ILRAM
+mmcif-obj-$(CONFIG_CPU_SUBTYPE_SH7724) := $(obj)/mmcif-sh7724.o
+load-$(CONFIG_ROMIMAGE_MMCIF) := $(mmcif-load-y)
+obj-$(CONFIG_ROMIMAGE_MMCIF) := $(mmcif-obj-y)
+
+LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(load-y) -e romstart \
-T $(obj)/../../kernel/vmlinux.lds
-$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE
+$(obj)/vmlinux: $(obj)/head.o $(obj-y) $(obj)/piggy.o FORCE
$(call if_changed,ld)
@:
/* include board specific setup code */
#include <mach/romimage.h>
+#ifdef CONFIG_ROMIMAGE_MMCIF
+ /* load the romImage to above the empty zero page */
+ mov.l empty_zero_page_dst, r4
+ mov.l empty_zero_page_dst_adj, r5
+ add r5, r4
+ mov.l bytes_to_load, r5
+ mov.l loader_function, r7
+ jsr @r7
+ mov r4, r15
+
+ mov.l empty_zero_page_dst, r4
+ mov.l empty_zero_page_dst_adj, r5
+ add r5, r4
+ mov.l loaded_code_offs, r5
+ add r5, r4
+ jmp @r4
+ nop
+
+ .balign 4
+empty_zero_page_dst_adj:
+ .long PAGE_SIZE
+bytes_to_load:
+ .long end_data - romstart
+loader_function:
+ .long mmcif_loader
+loaded_code_offs:
+ .long loaded_code - romstart
+loaded_code:
+#endif /* CONFIG_ROMIMAGE_MMCIF */
+
/* copy the empty_zero_page contents to where vmlinux expects it */
mova extra_data_pos, r0
mov.l extra_data_size, r1
--- /dev/null
+/*
+ * sh7724 MMCIF loader
+ *
+ * Copyright (C) 2010 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/mmc/sh_mmcif.h>
+#include <mach/romimage.h>
+
+#define MMCIF_BASE (void __iomem *)0xa4ca0000
+
+#define MSTPCR2 0xa4150038
+#define PTWCR 0xa4050146
+#define PTXCR 0xa4050148
+#define PSELA 0xa405014e
+#define PSELE 0xa4050156
+#define HIZCRC 0xa405015c
+#define DRVCRA 0xa405018a
+
+enum { MMCIF_PROGRESS_ENTER, MMCIF_PROGRESS_INIT,
+ MMCIF_PROGRESS_LOAD, MMCIF_PROGRESS_DONE };
+
+/* SH7724 specific MMCIF loader
+ *
+ * loads the romImage from an MMC card starting from block 512
+ * use the following line to write the romImage to an MMC card
+ * # dd if=arch/sh/boot/romImage of=/dev/sdx bs=512 seek=512
+ */
+asmlinkage void mmcif_loader(unsigned char *buf, unsigned long no_bytes)
+{
+ mmcif_update_progress(MMCIF_PROGRESS_ENTER);
+
+ /* enable clock to the MMCIF hardware block */
+ __raw_writel(__raw_readl(MSTPCR2) & ~0x20000000, MSTPCR2);
+
+ /* setup pins D7-D0 */
+ __raw_writew(0x0000, PTWCR);
+
+ /* setup pins MMC_CLK, MMC_CMD */
+ __raw_writew(__raw_readw(PTXCR) & ~0x000f, PTXCR);
+
+ /* select D3-D0 pin function */
+ __raw_writew(__raw_readw(PSELA) & ~0x2000, PSELA);
+
+ /* select D7-D4 pin function */
+ __raw_writew(__raw_readw(PSELE) & ~0x3000, PSELE);
+
+ /* disable Hi-Z for the MMC pins */
+ __raw_writew(__raw_readw(HIZCRC) & ~0x0620, HIZCRC);
+
+ /* high drive capability for MMC pins */
+ __raw_writew(__raw_readw(DRVCRA) | 0x3000, DRVCRA);
+
+ mmcif_update_progress(MMCIF_PROGRESS_INIT);
+
+ /* setup MMCIF hardware */
+ sh_mmcif_boot_init(MMCIF_BASE);
+
+ mmcif_update_progress(MMCIF_PROGRESS_LOAD);
+
+ /* load kernel via MMCIF interface */
+ sh_mmcif_boot_slurp(MMCIF_BASE, buf, no_bytes);
+
+ /* disable clock to the MMCIF hardware block */
+ __raw_writel(__raw_readl(MSTPCR2) | 0x20000000, MSTPCR2);
+
+ mmcif_update_progress(MMCIF_PROGRESS_DONE);
+}
.text : {
zero_page_pos = .;
*(.data)
+ end_data = .;
}
}
* MD3: BSC - Area0 Bus Width (16/32-bit) [CS0BCR.9,10]
* MD5: BSC - Endian Mode (L: Big, H: Little) [CMNCR.3]
* MD8: Test Mode
+ * BOOT: FBR - Boot Mode (L: MMCIF, H: Area0)
*/
/* Pin Function Controller:
+#ifdef __ASSEMBLY__
+
/* do nothing here by default */
+
+#else /* __ASSEMBLY__ */
+
+extern inline void mmcif_update_progress(int nr)
+{
+}
+
+#endif /* __ASSEMBLY__ */
+#ifdef __ASSEMBLY__
+
/* EcoVec 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 romImage
.align 2
1 : .long 0xa8000000
2 :
+
+#else /* __ASSEMBLY__ */
+
+/* Ecovec board specific information:
+ *
+ * Set the following to enable MMCIF boot from the MMC card in CN12:
+ *
+ * DS1.5 = OFF (SH BOOT pin set to L)
+ * DS2.6 = OFF (Select MMCIF on CN12 instead of SDHI1)
+ * DS2.7 = ON (Select MMCIF on CN12 instead of SDHI1)
+ *
+ */
+#define HIZCRA 0xa4050158
+#define PGDR 0xa405012c
+
+extern inline void mmcif_update_progress(int nr)
+{
+ /* disable Hi-Z for LED pins */
+ __raw_writew(__raw_readw(HIZCRA) & ~(1 << 1), HIZCRA);
+
+ /* update progress on LED4, LED5, LED6 and LED7 */
+ __raw_writeb(1 << (nr - 1), PGDR);
+}
+
+#endif /* __ASSEMBLY__ */
+#ifdef __ASSEMBLY__
+
/* 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 romImage
.align 2
1: .long 0xa8000000
2:
+
+#else /* __ASSEMBLY__ */
+
+extern inline void mmcif_update_progress(int nr)
+{
+}
+
+#endif /* __ASSEMBLY__ */
git.openpandora.org / pandora-kernel.git / commitdiff