diff options
| -rw-r--r-- | Documentation/arm/SH-Mobile/Makefile | 8 | ||||
| -rw-r--r-- | Documentation/arm/SH-Mobile/vrl4.c | 169 | ||||
| -rw-r--r-- | Documentation/arm/SH-Mobile/zboot-rom-mmcif.txt | 29 | ||||
| -rw-r--r-- | arch/arm/Kconfig | 12 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/Makefile | 13 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/head-shmobile.S | 30 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/mmcif-sh7372.c | 87 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/mmcif-ap4eb.h | 29 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/mmcif-mackerel.h | 39 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/mmcif.h | 18 |
10 files changed, 433 insertions, 1 deletions
diff --git a/Documentation/arm/SH-Mobile/Makefile b/Documentation/arm/SH-Mobile/Makefile new file mode 100644 index 00000000000..8771d832cf8 --- /dev/null +++ b/Documentation/arm/SH-Mobile/Makefile @@ -0,0 +1,8 @@ +BIN := vrl4 + +.PHONY: all +all: $(BIN) + +.PHONY: clean +clean: + rm -f *.o $(BIN) diff --git a/Documentation/arm/SH-Mobile/vrl4.c b/Documentation/arm/SH-Mobile/vrl4.c new file mode 100644 index 00000000000..e8a191358ad --- /dev/null +++ b/Documentation/arm/SH-Mobile/vrl4.c @@ -0,0 +1,169 @@ +/* + * vrl4 format generator + * + * Copyright (C) 2010 Simon Horman + * + * 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. + */ + +/* + * usage: vrl4 < zImage > out + * dd if=out of=/dev/sdx bs=512 seek=1 # Write the image to sector 1 + * + * Reads a zImage from stdin and writes a vrl4 image to stdout. + * In practice this means writing a padded vrl4 header to stdout followed + * by the zImage. + * + * The padding places the zImage at ALIGN bytes into the output. + * The vrl4 uses ALIGN + START_BASE as the start_address. + * This is where the mask ROM will jump to after verifying the header. + * + * The header sets copy_size to min(sizeof(zImage), MAX_BOOT_PROG_LEN) + ALIGN. + * That is, the mask ROM will load the padded header (ALIGN bytes) + * And then MAX_BOOT_PROG_LEN bytes of the image, or the entire image, + * whichever is smaller. + * + * The zImage is not modified in any way. + */ + +#define _BSD_SOURCE +#include <endian.h> +#include <unistd.h> +#include <stdint.h> +#include <stdio.h> +#include <errno.h> + +struct hdr { + uint32_t magic1; + uint32_t reserved1; + uint32_t magic2; + uint32_t reserved2; + uint16_t copy_size; + uint16_t boot_options; + uint32_t reserved3; + uint32_t start_address; + uint32_t reserved4; + uint32_t reserved5; + char reserved6[308]; +}; + +#define DECLARE_HDR(h) \ + struct hdr (h) = { \ + .magic1 = htole32(0xea000000), \ + .reserved1 = htole32(0x56), \ + .magic2 = htole32(0xe59ff008), \ + .reserved3 = htole16(0x1) } + +/* Align to 512 bytes, the MMCIF sector size */ +#define ALIGN_BITS 9 +#define ALIGN (1 << ALIGN_BITS) + +#define START_BASE 0xe55b0000 + +/* + * With an alignment of 512 the header uses the first sector. + * There is a 128 sector (64kbyte) limit on the data loaded by the mask ROM. + * So there are 127 sectors left for the boot programme. But in practice + * Only a small portion of a zImage is needed, 16 sectors should be more + * than enough. + * + * Note that this sets how much of the zImage is copied by the mask ROM. + * The entire zImage is present after the header and is loaded + * by the code in the boot program (which is the first portion of the zImage). + */ +#define MAX_BOOT_PROG_LEN (16 * 512) + +#define ROUND_UP(x) ((x + ALIGN - 1) & ~(ALIGN - 1)) + +ssize_t do_read(int fd, void *buf, size_t count) +{ + size_t offset = 0; + ssize_t l; + + while (offset < count) { + l = read(fd, buf + offset, count - offset); + if (!l) + break; + if (l < 0) { + if (errno == EAGAIN || errno == EWOULDBLOCK) + continue; + perror("read"); + return -1; + } + offset += l; + } + + return offset; +} + +ssize_t do_write(int fd, const void *buf, size_t count) +{ + size_t offset = 0; + ssize_t l; + + while (offset < count) { + l = write(fd, buf + offset, count - offset); + if (l < 0) { + if (errno == EAGAIN || errno == EWOULDBLOCK) + continue; + perror("write"); + return -1; + } + offset += l; + } + + return offset; +} + +ssize_t write_zero(int fd, size_t len) +{ + size_t i = len; + + while (i--) { + const char x = 0; + if (do_write(fd, &x, 1) < 0) + return -1; + } + + return len; +} + +int main(void) +{ + DECLARE_HDR(hdr); + char boot_program[MAX_BOOT_PROG_LEN]; + size_t aligned_hdr_len, alligned_prog_len; + ssize_t prog_len; + + prog_len = do_read(0, boot_program, sizeof(boot_program)); + if (prog_len <= 0) + return -1; + + aligned_hdr_len = ROUND_UP(sizeof(hdr)); + hdr.start_address = htole32(START_BASE + aligned_hdr_len); + alligned_prog_len = ROUND_UP(prog_len); + hdr.copy_size = htole16(aligned_hdr_len + alligned_prog_len); + + if (do_write(1, &hdr, sizeof(hdr)) < 0) + return -1; + if (write_zero(1, aligned_hdr_len - sizeof(hdr)) < 0) + return -1; + + if (do_write(1, boot_program, prog_len) < 0) + return 1; + + /* Write out the rest of the kernel */ + while (1) { + prog_len = do_read(0, boot_program, sizeof(boot_program)); + if (prog_len < 0) + return 1; + if (prog_len == 0) + break; + if (do_write(1, boot_program, prog_len) < 0) + return 1; + } + + return 0; +} diff --git a/Documentation/arm/SH-Mobile/zboot-rom-mmcif.txt b/Documentation/arm/SH-Mobile/zboot-rom-mmcif.txt new file mode 100644 index 00000000000..efff8ae2713 --- /dev/null +++ b/Documentation/arm/SH-Mobile/zboot-rom-mmcif.txt @@ -0,0 +1,29 @@ +ROM-able zImage boot from MMC +----------------------------- + +An ROM-able zImage compiled with ZBOOT_ROM_MMCIF may be written to MMC and +SuperH Mobile ARM will to boot directly from the MMCIF hardware block. + +This is achieved by the mask ROM loading the first portion of the image into +MERAM and then jumping to it. This portion contains loader code which +copies the entire image to SDRAM and jumps to it. From there the zImage +boot code proceeds as normal, uncompressing the image into its final +location and then jumping to it. + +This code has been tested on an AP4EB board using the developer 1A eMMC +boot mode which is configured using the following jumper settings. +The board used for testing required a patched mask ROM in order for +this mode to function. + + 8 7 6 5 4 3 2 1 + x|x|x|x|x| |x| +S4 -+-+-+-+-+-+-+- + | | | | |x| |x on + +The zImage must be written to the MMC card at sector 1 (512 bytes) in +vrl4 format. A utility vrl4 is supplied to accomplish this. + +e.g. + vrl4 < zImage | dd of=/dev/sdX bs=512 seek=1 + +A dual-voltage MMC 4.0 card was used for testing. diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 5cff165b7eb..2d0a1dc1599 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1619,6 +1619,18 @@ config ZBOOT_ROM Say Y here if you intend to execute your compressed kernel image (zImage) directly from ROM or flash. If unsure, say N. +config ZBOOT_ROM_MMCIF + bool "Include MMCIF loader in zImage (EXPERIMENTAL)" + depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL + help + Say Y here to include experimental MMCIF loading code in the + ROM-able zImage. With this enabled it is possible to write the + the ROM-able zImage 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 the ROM-able zImage + which in turn loads the rest the kernel image to RAM using the + MMCIF hardware block. + config CMDLINE string "Default kernel command string" default "" diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 0a8f748e506..198007d0a7e 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -4,9 +4,20 @@ # create a compressed vmlinuz image from the original vmlinux # +OBJS = + +# Ensure that mmcif loader code appears early in the image +# to minimise that number of bocks that have to be read in +# order to load it. +ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y) +ifeq ($(CONFIG_ARCH_SH7372),y) +OBJS += mmcif-sh7372.o +endif +endif + AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) HEAD = head.o -OBJS = misc.o decompress.o +OBJS += misc.o decompress.o FONTC = $(srctree)/drivers/video/console/font_acorn_8x8.c # diff --git a/arch/arm/boot/compressed/head-shmobile.S b/arch/arm/boot/compressed/head-shmobile.S index 30973b76e6a..c943d2e7da9 100644 --- a/arch/arm/boot/compressed/head-shmobile.S +++ b/arch/arm/boot/compressed/head-shmobile.S @@ -25,6 +25,36 @@ /* load board-specific initialization code */ #include <mach/zboot.h> +#ifdef CONFIG_ZBOOT_ROM_MMCIF + /* Load image from MMC */ + adr sp, __tmp_stack + 128 + ldr r0, __image_start + ldr r1, __image_end + subs r1, r1, r0 + ldr r0, __load_base + bl mmcif_loader + + /* Jump to loaded code */ + ldr r0, __loaded + ldr r1, __image_start + sub r0, r0, r1 + ldr r1, __load_base + add pc, r0, r1 + +__image_start: + .long _start +__image_end: + .long _got_end +__load_base: + .long CONFIG_MEMORY_START + 0x02000000 @ Load at 32Mb into SDRAM +__loaded: + .long __continue + .align +__tmp_stack: + .space 128 +__continue: +#endif /* CONFIG_ZBOOT_ROM_MMCIF */ + b 1f __atags:@ tag #1 .long 12 @ tag->hdr.size = tag_size(tag_core); diff --git a/arch/arm/boot/compressed/mmcif-sh7372.c b/arch/arm/boot/compressed/mmcif-sh7372.c new file mode 100644 index 00000000000..e6180af241f --- /dev/null +++ b/arch/arm/boot/compressed/mmcif-sh7372.c @@ -0,0 +1,87 @@ +/* + * sh7372 MMCIF loader + * + * Copyright (C) 2010 Magnus Damm + * Copyright (C) 2010 Simon Horman + * + * 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/mmcif.h> + +#define MMCIF_BASE (void __iomem *)0xe6bd0000 + +#define PORT84CR (void __iomem *)0xe6050054 +#define PORT85CR (void __iomem *)0xe6050055 +#define PORT86CR (void __iomem *)0xe6050056 +#define PORT87CR (void __iomem *)0xe6050057 +#define PORT88CR (void __iomem *)0xe6050058 +#define PORT89CR (void __iomem *)0xe6050059 +#define PORT90CR (void __iomem *)0xe605005a +#define PORT91CR (void __iomem *)0xe605005b +#define PORT92CR (void __iomem *)0xe605005c +#define PORT99CR (void __iomem *)0xe6050063 + +#define SMSTPCR3 (void __iomem *)0xe615013c + +/* SH7372 specific MMCIF loader + * + * loads the zImage from an MMC card starting from block 1. + * + * The image must be start with a vrl4 header and + * the zImage must start at offset 512 of the image. That is, + * at block 2 (=byte 1024) on the media + * + * Use the following line to write the vrl4 formated zImage + * to an MMC card + * # dd if=vrl4.out of=/dev/sdx bs=512 seek=1 + */ +asmlinkage void mmcif_loader(unsigned char *buf, unsigned long len) +{ + mmcif_init_progress(); + mmcif_update_progress(MMCIF_PROGRESS_ENTER); + + /* Initialise MMC + * registers: PORT84CR-PORT92CR + * (MMCD0_0-MMCD0_7,MMCCMD0 Control) + * value: 0x04 - select function 4 + */ + __raw_writeb(0x04, PORT84CR); + __raw_writeb(0x04, PORT85CR); + __raw_writeb(0x04, PORT86CR); + __raw_writeb(0x04, PORT87CR); + __raw_writeb(0x04, PORT88CR); + __raw_writeb(0x04, PORT89CR); + __raw_writeb(0x04, PORT90CR); + __raw_writeb(0x04, PORT91CR); + __raw_writeb(0x04, PORT92CR); + + /* Initialise MMC + * registers: PORT99CR (MMCCLK0 Control) + * value: 0x10 | 0x04 - enable output | select function 4 + */ + __raw_writeb(0x14, PORT99CR); + + /* Enable clock to MMC hardware block */ + __raw_writel(__raw_readl(SMSTPCR3) & ~(1 << 12), SMSTPCR3); + + 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_do_read(MMCIF_BASE, 2, /* Kernel is at block 2 */ + (len + SH_MMCIF_BBS - 1) / SH_MMCIF_BBS, buf); + + + /* Disable clock to MMC hardware block */ + __raw_writel(__raw_readl(SMSTPCR3) & (1 << 12), SMSTPCR3); + + mmcif_update_progress(MMCIF_PROGRESS_DONE); +} diff --git a/arch/arm/mach-shmobile/include/mach/mmcif-ap4eb.h b/arch/arm/mach-shmobile/include/mach/mmcif-ap4eb.h new file mode 100644 index 00000000000..a8d02be8d2b --- /dev/null +++ b/arch/arm/mach-shmobile/include/mach/mmcif-ap4eb.h @@ -0,0 +1,29 @@ +#ifndef MMCIF_AP4EB_H +#define MMCIF_AP4EB_H + +#define PORT185CR (void __iomem *)0xe60520b9 +#define PORT186CR (void __iomem *)0xe60520ba +#define PORT187CR (void __iomem *)0xe60520bb +#define PORT188CR (void __iomem *)0xe60520bc + +#define PORTR191_160DR (void __iomem *)0xe6056014 + +static inline void mmcif_init_progress(void) +{ + /* Initialise LEDS1-4 + * registers: PORT185CR-PORT188CR (LED1-LED4 Control) + * value: 0x10 - enable output + */ + __raw_writeb(0x10, PORT185CR); + __raw_writeb(0x10, PORT186CR); + __raw_writeb(0x10, PORT187CR); + __raw_writeb(0x10, PORT188CR); +} + +static inline void mmcif_update_progress(int n) +{ + __raw_writel((__raw_readl(PORTR191_160DR) & ~(0xf << 25)) | + (1 << (25 + n)), PORTR191_160DR); +} + +#endif /* MMCIF_AP4EB_H */ diff --git a/arch/arm/mach-shmobile/include/mach/mmcif-mackerel.h b/arch/arm/mach-shmobile/include/mach/mmcif-mackerel.h new file mode 100644 index 00000000000..4b4f6949a86 --- /dev/null +++ b/arch/arm/mach-shmobile/include/mach/mmcif-mackerel.h @@ -0,0 +1,39 @@ +#ifndef MMCIF_MACKEREL_H +#define MMCIF_MACKEREL_H + +#define PORT0CR (void __iomem *)0xe6051000 +#define PORT1CR (void __iomem *)0xe6051001 +#define PORT2CR (void __iomem *)0xe6051002 +#define PORT159CR (void __iomem *)0xe605009f + +#define PORTR031_000DR (void __iomem *)0xe6055000 +#define PORTL159_128DR (void __iomem *)0xe6054010 + +static inline void mmcif_init_progress(void) +{ + /* Initialise LEDS0-3 + * registers: PORT0CR-PORT2CR,PORT159CR (LED0-LED3 Control) + * value: 0x10 - enable output + */ + __raw_writeb(0x10, PORT0CR); + __raw_writeb(0x10, PORT1CR); + __raw_writeb(0x10, PORT2CR); + __raw_writeb(0x10, PORT159CR); +} + +static inline void mmcif_update_progress(int n) +{ + unsigned a = 0, b = 0; + + if (n < 3) + a = 1 << n; + else + b = 1 << 31; + + __raw_writel((__raw_readl(PORTR031_000DR) & ~0x7) | a, + PORTR031_000DR); + __raw_writel((__raw_readl(PORTL159_128DR) & ~(1 << 31)) | b, + PORTL159_128DR); +} + +#endif /* MMCIF_MACKEREL_H */ diff --git a/arch/arm/mach-shmobile/include/mach/mmcif.h b/arch/arm/mach-shmobile/include/mach/mmcif.h new file mode 100644 index 00000000000..f4dc3279cf0 --- /dev/null +++ b/arch/arm/mach-shmobile/include/mach/mmcif.h @@ -0,0 +1,18 @@ +#ifndef MMCIF_H +#define MMCIF_H + +/************************************************** + * + * board specific settings + * + **************************************************/ + +#ifdef CONFIG_MACH_AP4EVB +#include "mach/mmcif-ap4eb.h" +#elif CONFIG_MACH_MACKEREL +#include "mach/mmcif-mackerel.h" +#else +#error "unsupported board." +#endif + +#endif /* MMCIF_H */ |