[PATCH v9 04/17] h8300: kernel booting
From: Yoshinori Sato
Date: Mon Apr 27 2015 - 01:39:57 EST
zImage startup / kernel entry point / arch depend startup
Signed-off-by: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
---
arch/h8300/boot/Makefile | 26 +++++
arch/h8300/boot/compressed/Makefile | 37 +++++++
arch/h8300/boot/compressed/head.S | 48 +++++++++
arch/h8300/boot/compressed/misc.c | 74 ++++++++++++++
arch/h8300/boot/compressed/vmlinux.lds | 32 ++++++
arch/h8300/boot/compressed/vmlinux.scr | 9 ++
arch/h8300/kernel/head_ram.S | 60 ++++++++++++
arch/h8300/kernel/head_rom.S | 108 ++++++++++++++++++++
arch/h8300/kernel/setup.c | 174 +++++++++++++++++++++++++++++++++
9 files changed, 568 insertions(+)
create mode 100644 arch/h8300/boot/Makefile
create mode 100644 arch/h8300/boot/compressed/Makefile
create mode 100644 arch/h8300/boot/compressed/head.S
create mode 100644 arch/h8300/boot/compressed/misc.c
create mode 100644 arch/h8300/boot/compressed/vmlinux.lds
create mode 100644 arch/h8300/boot/compressed/vmlinux.scr
create mode 100644 arch/h8300/kernel/head_ram.S
create mode 100644 arch/h8300/kernel/head_rom.S
create mode 100644 arch/h8300/kernel/setup.c
diff --git a/arch/h8300/boot/Makefile b/arch/h8300/boot/Makefile
new file mode 100644
index 0000000..2f6393a
--- /dev/null
+++ b/arch/h8300/boot/Makefile
@@ -0,0 +1,26 @@
+# arch/h8300/boot/Makefile
+
+targets := vmlinux.srec vmlinux.bin zImage
+subdir- := compressed
+
+OBJCOPYFLAGS_vmlinux.srec := -Osrec
+OBJCOPYFLAGS_vmlinux.bin := -Obinary
+OBJCOPYFLAGS_zImage := -O binary -R .note -R .comment -R .stab -R .stabstr -S
+
+UIMAGE_LOADADDR = $(CONFIG_RAMBASE)
+UIMAGE_ENTRYADDR = $(shell /bin/bash -c 'printf "0x%08x" \
+ $$[$(CONFIG_RAMBASE) + $(CONFIG_OFFSET)]')
+
+$(obj)/vmlinux.srec $(obj)/vmlinux.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/compressed/vmlinux: FORCE
+ $(Q)$(MAKE) $(build)=$(obj)/compressed $@
+
+$(obj)/uImage.bin: $(obj)/vmlinux.bin
+ $(call if_changed,uimage,none)
+
+CLEAN_FILES += arch/$(ARCH)/vmlinux.bin arch/$(ARCH)/vmlinux.srec arch/$(ARCH)/uImage.bin
diff --git a/arch/h8300/boot/compressed/Makefile b/arch/h8300/boot/compressed/Makefile
new file mode 100644
index 0000000..87d03b7
--- /dev/null
+++ b/arch/h8300/boot/compressed/Makefile
@@ -0,0 +1,37 @@
+#
+# linux/arch/sh/boot/compressed/Makefile
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
+
+OBJECTS = $(obj)/head.o $(obj)/misc.o
+
+#
+# IMAGE_OFFSET is the load offset of the compression loader
+# Assign dummy values if these 2 variables are not defined,
+# in order to suppress error message.
+#
+CONFIG_MEMORY_START ?= 0x00400000
+CONFIG_BOOT_LINK_OFFSET ?= 0x00140000
+IMAGE_OFFSET := $(shell printf "0x%08x" $$(($(CONFIG_MEMORY_START)+$(CONFIG_BOOT_LINK_OFFSET))))
+
+LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -estartup $(obj)/vmlinux.lds
+
+$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
+ $(call if_changed,ld)
+ @:
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,gzip)
+
+LDFLAGS_piggy.o := -r --format binary --oformat elf32-h8300-linux -T
+OBJCOPYFLAGS := -O binary
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
+ $(call if_changed,ld)
diff --git a/arch/h8300/boot/compressed/head.S b/arch/h8300/boot/compressed/head.S
new file mode 100644
index 0000000..74c0d8cc
--- /dev/null
+++ b/arch/h8300/boot/compressed/head.S
@@ -0,0 +1,48 @@
+/*
+ * linux/arch/h8300/boot/compressed/head.S
+ *
+ * Copyright (C) 2006 Yoshinori Sato
+ */
+
+#include <linux/linkage.h>
+
+ .section .text..startup,"ax"
+ .global startup
+startup:
+ mov.l er0, er4
+ mov.l er0, sp
+ mov.l #__sbss, er0
+ mov.l #__ebss, er1
+ sub.l er0, er1
+ shlr er1
+ shlr er1
+ sub.l er2, er2
+1:
+ mov.l er2, @er0
+ adds #4, er0
+ dec.l #1, er1
+ bne 1b
+ jsr @decompress_kernel
+ mov.l er4, er0
+ jmp @0x400000
+
+ .align 9
+fake_headers_as_bzImage:
+ .word 0
+ .ascii "HdrS" ; header signature
+ .word 0x0202 ; header version number (>= 0x0105)
+ ; or else old loadlin-1.5 will fail)
+ .word 0 ; default_switch
+ .word 0 ; SETUPSEG
+ .word 0x1000
+ .word 0 ; pointing to kernel version string
+ .byte 0 ; = 0, old one (LILO, Loadlin,
+ ; 0xTV: T=0 for LILO
+ ; V = version
+ .byte 1 ; Load flags bzImage=1
+ .word 0x8000 ; size to move, when setup is not
+ .long 0x100000 ; 0x100000 = default for big kernel
+ .long 0 ; address of loaded ramdisk image
+ .long 0 ; its size in bytes
+
+ .end
diff --git a/arch/h8300/boot/compressed/misc.c b/arch/h8300/boot/compressed/misc.c
new file mode 100644
index 0000000..7042741
--- /dev/null
+++ b/arch/h8300/boot/compressed/misc.c
@@ -0,0 +1,74 @@
+/*
+ * arch/h8300/boot/compressed/misc.c
+ *
+ * This is a collection of several routines from gzip-1.0.3
+ * adapted for Linux.
+ *
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ *
+ * Adapted for h8300 by Yoshinori Sato 2006
+ */
+
+#include <asm/uaccess.h>
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args) args
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#define memzero(s, n) memset((s), (0), (n))
+
+extern int _end;
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+extern char input_data[];
+extern int input_len;
+static unsigned char *output;
+
+#define HEAP_SIZE 0x10000
+
+#include "../../../../lib/decompress_inflate.c"
+
+void *memset(void *s, int c, size_t n)
+{
+ int i;
+ char *ss = (char *)s;
+
+ for (i = 0; i < n; i++)
+ ss[i] = c;
+ return s;
+}
+
+void *memcpy(void *dest, const void *src, size_t n)
+{
+ int i;
+ char *d = (char *)dest, *s = (char *)src;
+
+ for (i = 0; i < n; i++)
+ d[i] = s[i];
+ return dest;
+}
+
+static void error(char *x)
+{
+
+ while (1)
+ ; /* Halt */
+}
+
+#define STACK_SIZE (4096)
+long user_stack[STACK_SIZE];
+long *stack_start = &user_stack[STACK_SIZE];
+
+void decompress_kernel(void)
+{
+ free_mem_ptr = (unsigned long)&_end;
+ free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+ decompress(input_data, input_len, NULL, NULL, output, NULL, error);
+}
diff --git a/arch/h8300/boot/compressed/vmlinux.lds b/arch/h8300/boot/compressed/vmlinux.lds
new file mode 100644
index 0000000..a0a3a0e
--- /dev/null
+++ b/arch/h8300/boot/compressed/vmlinux.lds
@@ -0,0 +1,32 @@
+SECTIONS
+{
+ .text :
+ {
+ __stext = . ;
+ __text = .;
+ *(.text..startup)
+ *(.text)
+ __etext = . ;
+ }
+
+ .rodata :
+ {
+ *(.rodata)
+ }
+ .data :
+
+ {
+ __sdata = . ;
+ ___data_start = . ;
+ *(.data.*)
+ }
+ .bss :
+ {
+ . = ALIGN(0x4) ;
+ __sbss = . ;
+ *(.bss*)
+ . = ALIGN(0x4) ;
+ __ebss = . ;
+ __end = . ;
+ }
+}
diff --git a/arch/h8300/boot/compressed/vmlinux.scr b/arch/h8300/boot/compressed/vmlinux.scr
new file mode 100644
index 0000000..a0849036
--- /dev/null
+++ b/arch/h8300/boot/compressed/vmlinux.scr
@@ -0,0 +1,9 @@
+SECTIONS
+{
+ .data : {
+ input_len = .;
+ LONG(input_data_end - input_data) input_data = .;
+ *(.data)
+ input_data_end = .;
+ }
+}
diff --git a/arch/h8300/kernel/head_ram.S b/arch/h8300/kernel/head_ram.S
new file mode 100644
index 0000000..f64b3d9
--- /dev/null
+++ b/arch/h8300/kernel/head_ram.S
@@ -0,0 +1,60 @@
+
+#include <linux/sys.h>
+#include <linux/init.h>
+#include <asm/unistd.h>
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/errno.h>
+
+#if defined(CONFIG_CPU_H8300H)
+ .h8300h
+#define SYSCR 0xfee012
+#define IRAMTOP 0xffff20
+#endif
+#if defined(CONFIG_CPU_H8S)
+ .h8300s
+#define INTCR 0xffff31
+#define IRAMTOP 0xffc000
+#endif
+
+ __HEAD
+ .global _start
+_start:
+ mov.l #IRAMTOP,sp
+ /* .bss clear */
+ mov.l #_sbss,er5
+ mov.l #_ebss,er4
+ sub.l er5,er4
+ shlr er4
+ shlr er4
+ sub.l er1,er1
+1:
+ mov.l er1,@er5
+ adds #4,er5
+ dec.l #1,er4
+ bne 1b
+ jsr @parse_bootparam
+
+ /* linux kernel start */
+#if defined(CONFIG_CPU_H8300H)
+ ldc #0xd0,ccr /* running kernel */
+ mov.l #SYSCR,er0
+ bclr #3,@er0
+#endif
+#if defined(CONFIG_CPU_H8S)
+ ldc #0x07,exr
+ bclr #4,@INTCR:8
+ bset #5,@INTCR:8 /* Interrupt mode 2 */
+ ldc #0x90,ccr /* running kernel */
+#endif
+ mov.l #init_thread_union,sp
+ add.l #0x2000,sp
+ jsr @start_kernel
+
+1:
+ bra 1b
+
+ .end
diff --git a/arch/h8300/kernel/head_rom.S b/arch/h8300/kernel/head_rom.S
new file mode 100644
index 0000000..60ca8fa
--- /dev/null
+++ b/arch/h8300/kernel/head_rom.S
@@ -0,0 +1,108 @@
+#include <linux/init.h>
+#include <asm/thread_info.h>
+
+#if defined(CONFIG_CPU_H8300H)
+ .h8300h
+#define SYSCR 0xfee012
+#define IRAMTOP 0xffff20
+#define NR_INT 64
+#endif
+#if defined(CONFIG_CPU_H8S)
+ .h8300s
+#define INTCR 0xffff31
+#define IRAMTOP 0xffc000
+#define NR_INT 128
+#endif
+
+ __HEAD
+ .global _start
+_start:
+ mov.l #IRAMTOP,sp
+#if !defined(CONFIG_H8300H_SIM) && \
+ !defined(CONFIG_H8S_SIM)
+ jsr @lowlevel_init
+
+ /* copy .data */
+ mov.l #_begin_data,er5
+ mov.l #_sdata,er6
+ mov.l #_edata,er4
+ sub.l er6,er4
+ shlr.l er4
+ shlr.l er4
+1:
+ mov.l @er5+,er0
+ mov.l er0,@er6
+ adds #4,er6
+ dec.l #1,er4
+ bne 1b
+ /* .bss clear */
+ mov.l #_sbss,er5
+ mov.l #_ebss,er4
+ sub.l er5,er4
+ shlr er4
+ shlr er4
+ sub.l er0,er0
+1:
+ mov.l er0,@er5
+ adds #4,er5
+ dec.l #1,er4
+ bne 1b
+#else
+ /* get cmdline from gdb */
+ jsr @0xcc
+ ;; er0 - argc
+ ;; er1 - argv
+ mov.l #command_line,er3
+ adds #4,er1
+ dec.l #1,er0
+ beq 4f
+1:
+ mov.l @er1+,er2
+2:
+ mov.b @er2+,r4l
+ beq 3f
+ mov.b r4l,@er3
+ adds #1,er3
+ bra 2b
+3:
+ mov.b #' ',r4l
+ mov.b r4l,@er3
+ adds #1,er3
+ dec.l #1,er0
+ bne 1b
+ subs #1,er3
+ mov.b #0,r4l
+ mov.b r4l,@er3
+4:
+#endif
+ /* linux kernel start */
+#if defined(CONFIG_CPU_H8300H)
+ ldc #0xd0,ccr /* running kernel */
+ mov.l #SYSCR,er0
+ bclr #3,@er0
+#endif
+#if defined(CONFIG_CPU_H8S)
+ ldc #0x07,exr
+ bclr #4,@INTCR:8
+ bset #5,@INTCR:8 /* Interrupt mode 2 */
+ ldc #0x90,ccr /* running kernel */
+#endif
+ mov.l #init_thread_union,sp
+ add.l #0x2000,sp
+ jsr @start_kernel
+
+1:
+ bra 1b
+
+#if defined(CONFIG_ROMKERNEL)
+ /* interrupt vector */
+ .section .vectors,"ax"
+ .long _start
+ .long _start
+vector = 2
+ .rept NR_INT - 2
+ .long _interrupt_redirect_table+vector*4
+vector = vector + 1
+ .endr
+#endif
+ .end
diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c
new file mode 100644
index 0000000..95e7fb6
--- /dev/null
+++ b/arch/h8300/kernel/setup.c
@@ -0,0 +1,174 @@
+/*
+ * linux/arch/h8300/kernel/setup.c
+ *
+ * Copyright (C) 2001-2014 Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
+ */
+
+/*
+ * This file handles the architecture-dependent parts of system setup
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/console.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
+#include <asm/bootparams.h>
+#include <asm/page.h>
+
+#if defined(CONFIG_CPU_H8300H)
+#define CPU "H8/300H"
+#elif defined(CONFIG_CPU_H8S)
+#define CPU "H8S"
+#else
+#define CPU "Unknown"
+#endif
+
+struct bootparams bootparams;
+unsigned long rom_length;
+unsigned long memory_start;
+unsigned long memory_end;
+EXPORT_SYMBOL(memory_end);
+
+char __initdata command_line[COMMAND_LINE_SIZE];
+
+void sim_console_register(void);
+int h8300_clk_init(unsigned long hz);
+
+void __init __attribute__((weak)) early_device_init(void)
+{
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ int bootmap_size;
+
+#if defined(CONFIG_ROMKERNEL)
+ bootparams.ram_end = CONFIG_RAMBASE + CONFIG_RAMSIZE;
+ bootparams.clock_freq = CONFIG_CPU_CLOCK;
+#endif
+
+ memory_start = (unsigned long) &_ramend;
+
+ memory_start = PAGE_ALIGN(memory_start);
+ memory_end = bootparams.ram_end;
+
+ init_mm.start_code = (unsigned long) _stext;
+ init_mm.end_code = (unsigned long) _etext;
+ init_mm.end_data = (unsigned long) _edata;
+ init_mm.brk = (unsigned long) 0;
+
+ pr_notice("\r\n\nuClinux " CPU "\n");
+ pr_notice("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
+
+ strcpy(boot_command_line, command_line);
+ *cmdline_p = command_line;
+
+ parse_early_param();
+
+ /*
+ * give all the memory to the bootmap allocator, tell it to put the
+ * boot mem_map at the start of memory
+ */
+ bootmap_size = init_bootmem_node(
+ NODE_DATA(0),
+ memory_start >> PAGE_SHIFT, /* map goes here */
+ PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */
+ memory_end >> PAGE_SHIFT);
+ /*
+ * free the usable memory, we have to make sure we do not free
+ * the bootmem bitmap so we then reserve it after freeing it :-)
+ */
+ free_bootmem(memory_start, memory_end - memory_start);
+ reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
+#if defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)
+ sim_console_register();
+#endif
+
+ early_device_init();
+ early_platform_driver_probe("earlyprintk", 1, 0);
+ /*
+ * get kmalloc into gear
+ */
+ paging_init();
+}
+
+/*
+ * Get CPU information for use by the procfs.
+ */
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ char *cpu;
+ u_long clockfreq;
+
+ cpu = CPU;
+ clockfreq = bootparams.clock_freq;
+
+ seq_printf(m, "CPU:\t\t%s\n"
+ "Clock:\t\t%lu.%1luMHz\n"
+ "BogoMips:\t%lu.%02lu\n"
+ "Calibration:\t%lu loops\n",
+ cpu,
+ clockfreq/1000, clockfreq%1000,
+ (loops_per_jiffy*HZ)/500000,
+ ((loops_per_jiffy*HZ)/5000)%100,
+ (loops_per_jiffy*HZ));
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ return *pos < num_possible_cpus() ?
+ ((void *) 0x12345678) : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+};
+
+void __init parse_bootparam(struct bootparams *bp)
+{
+ memcpy(&bootparams, bp, bp->size);
+ strncpy(command_line, bootparams.command_line, sizeof(command_line));
+}
+
+static void __init timer_setup(void)
+{
+ early_platform_driver_register_all("earlytimer");
+ early_platform_driver_probe("earlytimer", 1, 0);
+}
+
+void __init time_init(void)
+{
+ h8300_clk_init(bootparams.clock_freq);
+ late_time_init = timer_setup;
+}
--
2.1.4
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