sh: Merge the sh64 zImage bits.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

9 files changed, 581 insertions, 42 deletions

diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
index 906a13f82fe0..efb01dc3c8c3 100644
--- a/arch/sh/boot/compressed/Makefile
+++ b/arch/sh/boot/compressed/Makefile
@@ -1,43 +1,5 @@
-#
-# 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
-EXTRA_AFLAGS    := -traditional
-
-OBJECTS = $(obj)/head.o $(obj)/misc.o
-
-ifdef CONFIG_SH_STANDARD_BIOS
-OBJECTS += $(obj)/../../kernel/sh_bios.o
+ifeq ($(CONFIG_SUPERH32),y)
+include ${srctree}/arch/sh/boot/compressed/Makefile_32
+else
+include ${srctree}/arch/sh/boot/compressed/Makefile_64
 endif
-
-#
-# IMAGE_OFFSET is the load offset of the compression loader
-#
-IMAGE_OFFSET    := $(shell /bin/bash -c 'printf "0x%08x" \
-                     $$[$(CONFIG_PAGE_OFFSET)  + \
-                        $(CONFIG_MEMORY_START) + \
-                        $(CONFIG_BOOT_LINK_OFFSET)]')
-
-LIBGCC  := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
-
-LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup -T $(obj)/../../kernel/vmlinux.lds
-
-
-$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
-        $(call if_changed,ld)
-        @:
-
-$(obj)/vmlinux.bin: vmlinux FORCE
-        $(call if_changed,objcopy)
-
-$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
-        $(call if_changed,gzip)
-
-LDFLAGS_piggy.o := -r --format binary --oformat elf32-sh-linux -T
-OBJCOPYFLAGS += -R .empty_zero_page
-
-$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
-        $(call if_changed,ld)
diff --git a/arch/sh/boot/compressed/Makefile_32 b/arch/sh/boot/compressed/Makefile_32
new file mode 100644
index 000000000000..6ac8d4a4ed1d
--- /dev/null
+++ b/arch/sh/boot/compressed/Makefile_32
@@ -0,0 +1,43 @@
+#
+# linux/arch/sh/boot/compressed/Makefile
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+targets         := vmlinux vmlinux.bin vmlinux.bin.gz \
+                   head_32.o misc_32.o piggy.o
+EXTRA_AFLAGS    := -traditional
+
+OBJECTS = $(obj)/head_32.o $(obj)/misc_32.o
+
+ifdef CONFIG_SH_STANDARD_BIOS
+OBJECTS += $(obj)/../../kernel/sh_bios.o
+endif
+
+#
+# IMAGE_OFFSET is the load offset of the compression loader
+#
+IMAGE_OFFSET    := $(shell /bin/bash -c 'printf "0x%08x" \
+                     $$[$(CONFIG_PAGE_OFFSET)  + \
+                        $(CONFIG_MEMORY_START) + \
+                        $(CONFIG_BOOT_LINK_OFFSET)]')
+
+LIBGCC  := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+
+LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup -T $(obj)/../../kernel/vmlinux.lds
+
+$(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
+        $(call if_changed,gzip)
+
+LDFLAGS_piggy.o := -r --format binary --oformat elf32-sh-linux -T
+OBJCOPYFLAGS += -R .empty_zero_page
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
+        $(call if_changed,ld)
diff --git a/arch/sh/boot/compressed/Makefile_64 b/arch/sh/boot/compressed/Makefile_64
new file mode 100644
index 000000000000..0b48ae99922b
--- /dev/null
+++ b/arch/sh/boot/compressed/Makefile_64
@@ -0,0 +1,45 @@
+#
+# linux/arch/sh64/boot/compressed/Makefile
+#
+# 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.
+#
+# Copyright (C) 2002 Stuart Menefy
+# Copyright (C) 2004 Paul Mundt
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+targets         := vmlinux vmlinux.bin vmlinux.bin.gz \
+                   head_64.o misc_64.o cache.o piggy.o
+EXTRA_AFLAGS    := -traditional
+
+OBJECTS         := $(obj)/vmlinux_64.lds $(obj)/head_64.o $(obj)/misc_64.o \
+                   $(obj)/cache.o
+
+#
+# ZIMAGE_OFFSET is the load offset of the compression loader
+# (4M for the kernel plus 64K for this loader)
+#
+ZIMAGE_OFFSET   := $(shell /bin/bash -c 'printf "0x%08x" \
+                     $$[$(CONFIG_PAGE_OFFSET)+0x400000+0x10000]')
+
+LDFLAGS_vmlinux := -Ttext $(ZIMAGE_OFFSET) -e startup \
+                    -T $(obj)/../../kernel/vmlinux.lds
+
+$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE
+        $(call if_changed,ld)
+        @:
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+        $(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+        $(call if_changed,gzip)
+
+LDFLAGS_piggy.o := -r --format binary --oformat elf32-sh64-linux -T
+OBJCOPYFLAGS += -R .empty_zero_page
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
+        $(call if_changed,ld)
diff --git a/arch/sh/boot/compressed/cache.c b/arch/sh/boot/compressed/cache.c
new file mode 100644
index 000000000000..e27fc74f228c
--- /dev/null
+++ b/arch/sh/boot/compressed/cache.c
@@ -0,0 +1,12 @@
+int cache_control(unsigned int command)
+{
+        volatile unsigned int *p = (volatile unsigned int *) 0x80000000;
+        int i;
+
+        for (i = 0; i < (32 * 1024); i += 32) {
+                (void)*p;
+                p += (32 / sizeof (int));
+        }
+
+        return 0;
+}
diff --git a/arch/sh/boot/compressed/head.S b/arch/sh/boot/compressed/head_32.S
index a8399b013729..a8399b013729 100644
--- a/arch/sh/boot/compressed/head.S
+++ b/arch/sh/boot/compressed/head_32.S
diff --git a/arch/sh/boot/compressed/head_64.S b/arch/sh/boot/compressed/head_64.S
new file mode 100644
index 000000000000..1d4ecbfc767c
--- /dev/null
+++ b/arch/sh/boot/compressed/head_64.S
@@ -0,0 +1,163 @@
+/*
+ * 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.
+ *
+ * arch/shmedia/boot/compressed/head.S
+ *
+ * Copied from
+ *   arch/shmedia/kernel/head.S
+ * which carried the copyright:
+ *   Copyright (C) 2000, 2001  Paolo Alberelli
+ *
+ * Modification for compressed loader:
+ *   Copyright (C) 2002 Stuart Menefy (stuart.menefy@st.com)
+ */
+#include <linux/linkage.h>
+#include <asm/cache.h>
+#include <asm/cpu/mmu_context.h>
+#include <asm/cpu/registers.h>
+
+/*
+ * Fixed TLB entries to identity map the beginning of RAM
+ */
+#define MMUIR_TEXT_H    0x0000000000000003 | CONFIG_MEMORY_START
+                        /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */
+#define MMUIR_TEXT_L    0x000000000000009a | CONFIG_MEMORY_START
+                        /* 512 Mb, Cacheable (Write-back), execute, Not User, Ph. Add. */
+
+#define MMUDR_CACHED_H  0x0000000000000003 | CONFIG_MEMORY_START
+                        /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */
+#define MMUDR_CACHED_L  0x000000000000015a | CONFIG_MEMORY_START
+                        /* 512 Mb, Cacheable (Write-back), read/write, Not User, Ph. Add. */
+
+#define ICCR0_INIT_VAL  ICCR0_ON | ICCR0_ICI            /* ICE + ICI */
+#define ICCR1_INIT_VAL  ICCR1_NOLOCK                    /* No locking */
+
+#if 1
+#define OCCR0_INIT_VAL  OCCR0_ON | OCCR0_OCI | OCCR0_WB /* OCE + OCI + WB */
+#else
+#define OCCR0_INIT_VAL  OCCR0_OFF
+#endif
+#define OCCR1_INIT_VAL  OCCR1_NOLOCK                    /* No locking */
+
+        .text
+
+        .global startup
+startup:
+        /*
+         * Prevent speculative fetch on device memory due to
+         * uninitialized target registers.
+         * This must be executed before the first branch.
+         */
+        ptabs/u r63, tr0
+        ptabs/u r63, tr1
+        ptabs/u r63, tr2
+        ptabs/u r63, tr3
+        ptabs/u r63, tr4
+        ptabs/u r63, tr5
+        ptabs/u r63, tr6
+        ptabs/u r63, tr7
+        synci
+
+        /*
+         * Set initial TLB entries for cached and uncached regions.
+         * Note: PTA/BLINK is PIC code, PTABS/BLINK isn't !
+         */
+        /* Clear ITLBs */
+        pta     1f, tr1
+        movi    ITLB_FIXED, r21
+        movi    ITLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22
+1:      putcfg  r21, 0, r63             /* Clear MMUIR[n].PTEH.V */
+        addi    r21, TLB_STEP, r21
+        bne     r21, r22, tr1
+
+        /* Clear DTLBs */
+        pta     1f, tr1
+        movi    DTLB_FIXED, r21
+        movi    DTLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22
+1:      putcfg  r21, 0, r63             /* Clear MMUDR[n].PTEH.V */
+        addi    r21, TLB_STEP, r21
+        bne     r21, r22, tr1
+
+        /* Map one big (512Mb) page for ITLB */
+        movi    ITLB_FIXED, r21
+        movi    MMUIR_TEXT_L, r22       /* PTEL first */
+        putcfg  r21, 1, r22             /* Set MMUIR[0].PTEL */
+        movi    MMUIR_TEXT_H, r22       /* PTEH last */
+        putcfg  r21, 0, r22             /* Set MMUIR[0].PTEH */
+
+        /* Map one big CACHED (512Mb) page for DTLB */
+        movi    DTLB_FIXED, r21
+        movi    MMUDR_CACHED_L, r22     /* PTEL first */
+        putcfg  r21, 1, r22             /* Set MMUDR[0].PTEL */
+        movi    MMUDR_CACHED_H, r22     /* PTEH last */
+        putcfg  r21, 0, r22             /* Set MMUDR[0].PTEH */
+
+        /* ICache */
+        movi    ICCR_BASE, r21
+        movi    ICCR0_INIT_VAL, r22
+        movi    ICCR1_INIT_VAL, r23
+        putcfg  r21, ICCR_REG0, r22
+        putcfg  r21, ICCR_REG1, r23
+        synci
+
+        /* OCache */
+        movi    OCCR_BASE, r21
+        movi    OCCR0_INIT_VAL, r22
+        movi    OCCR1_INIT_VAL, r23
+        putcfg  r21, OCCR_REG0, r22
+        putcfg  r21, OCCR_REG1, r23
+        synco
+
+        /*
+         * Enable the MMU.
+         * From here-on code can be non-PIC.
+         */
+        movi    SR_HARMLESS | SR_ENABLE_MMU, r22
+        putcon  r22, SSR
+        movi    1f, r22
+        putcon  r22, SPC
+        synco
+        rte                             /* And now go into the hyperspace ... */
+1:                                      /* ... that's the next instruction ! */
+
+        /* Set initial stack pointer */
+        movi    datalabel stack_start, r0
+        ld.l    r0, 0, r15
+
+        /*
+         * Clear bss
+         */
+        pt      1f, tr1
+        movi    datalabel __bss_start, r22
+        movi    datalabel _end, r23
+1:      st.l    r22, 0, r63
+        addi    r22, 4, r22
+        bne     r22, r23, tr1
+
+        /*
+         * Decompress the kernel.
+         */
+        pt      decompress_kernel, tr0
+        blink   tr0, r18
+
+        /*
+         * Disable the MMU.
+         */
+        movi    SR_HARMLESS, r22
+        putcon  r22, SSR
+        movi    1f, r22
+        putcon  r22, SPC
+        synco
+        rte                             /* And now go into the hyperspace ... */
+1:                                      /* ... that's the next instruction ! */
+
+        /* Jump into the decompressed kernel */
+        movi    datalabel (CONFIG_MEMORY_START + 0x2000)+1, r19
+        ptabs   r19, tr0
+        blink   tr0, r18
+
+        /* Shouldn't return here, but just in case, loop forever */
+        pt      1f, tr0
+1:      blink   tr0, r63
diff --git a/arch/sh/boot/compressed/misc.c b/arch/sh/boot/compressed/misc_32.c
index df65e305acf7..df65e305acf7 100644
--- a/arch/sh/boot/compressed/misc.c
+++ b/arch/sh/boot/compressed/misc_32.c
diff --git a/arch/sh/boot/compressed/misc_64.c b/arch/sh/boot/compressed/misc_64.c
new file mode 100644
index 000000000000..aea00c53ce29
--- /dev/null
+++ b/arch/sh/boot/compressed/misc_64.c
@@ -0,0 +1,250 @@
+/*
+ * arch/sh64/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 SHmedia from sh by Stuart Menefy, May 2002
+ */
+
+#include <asm/uaccess.h>
+
+/* cache.c */
+#define CACHE_ENABLE      0
+#define CACHE_DISABLE     1
+int cache_control(unsigned int command);
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args)  args
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#define memzero(s, n)     memset ((s), 0, (n))
+
+typedef unsigned char uch;
+typedef unsigned short ush;
+typedef unsigned long ulg;
+
+#define WSIZE 0x8000            /* Window size must be at least 32k, */
+                                /* and a power of two */
+
+static uch *inbuf;              /* input buffer */
+static uch window[WSIZE];       /* Sliding window buffer */
+
+static unsigned insize = 0;     /* valid bytes in inbuf */
+static unsigned inptr = 0;      /* index of next byte to be processed in inbuf */
+static unsigned outcnt = 0;     /* bytes in output buffer */
+
+/* gzip flag byte */
+#define ASCII_FLAG   0x01       /* bit 0 set: file probably ASCII text */
+#define CONTINUATION 0x02       /* bit 1 set: continuation of multi-part gzip file */
+#define EXTRA_FIELD  0x04       /* bit 2 set: extra field present */
+#define ORIG_NAME    0x08       /* bit 3 set: original file name present */
+#define COMMENT      0x10       /* bit 4 set: file comment present */
+#define ENCRYPTED    0x20       /* bit 5 set: file is encrypted */
+#define RESERVED     0xC0       /* bit 6,7:   reserved */
+
+#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+
+/* Diagnostic functions */
+#ifdef DEBUG
+#  define Assert(cond,msg) {if(!(cond)) error(msg);}
+#  define Trace(x) fprintf x
+#  define Tracev(x) {if (verbose) fprintf x ;}
+#  define Tracevv(x) {if (verbose>1) fprintf x ;}
+#  define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
+#  define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
+#else
+#  define Assert(cond,msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+#endif
+
+static int fill_inbuf(void);
+static void flush_window(void);
+static void error(char *m);
+static void gzip_mark(void **);
+static void gzip_release(void **);
+
+extern char input_data[];
+extern int input_len;
+
+static long bytes_out = 0;
+static uch *output_data;
+static unsigned long output_ptr = 0;
+
+static void *malloc(int size);
+static void free(void *where);
+static void error(char *m);
+static void gzip_mark(void **);
+static void gzip_release(void **);
+
+static void puts(const char *);
+
+extern int _text;               /* Defined in vmlinux.lds.S */
+extern int _end;
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+#define HEAP_SIZE             0x10000
+
+#include "../../../../lib/inflate.c"
+
+static void *malloc(int size)
+{
+        void *p;
+
+        if (size < 0)
+                error("Malloc error\n");
+        if (free_mem_ptr == 0)
+                error("Memory error\n");
+
+        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
+
+        p = (void *) free_mem_ptr;
+        free_mem_ptr += size;
+
+        if (free_mem_ptr >= free_mem_end_ptr)
+                error("\nOut of memory\n");
+
+        return p;
+}
+
+static void free(void *where)
+{                               /* Don't care */
+}
+
+static void gzip_mark(void **ptr)
+{
+        *ptr = (void *) free_mem_ptr;
+}
+
+static void gzip_release(void **ptr)
+{
+        free_mem_ptr = (long) *ptr;
+}
+
+void puts(const char *s)
+{
+}
+
+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;
+}
+
+/* ===========================================================================
+ * Fill the input buffer. This is called only when the buffer is empty
+ * and at least one byte is really needed.
+ */
+static int fill_inbuf(void)
+{
+        if (insize != 0) {
+                error("ran out of input data\n");
+        }
+
+        inbuf = input_data;
+        insize = input_len;
+        inptr = 1;
+        return inbuf[0];
+}
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void flush_window(void)
+{
+        ulg c = crc;            /* temporary variable */
+        unsigned n;
+        uch *in, *out, ch;
+
+        in = window;
+        out = &output_data[output_ptr];
+        for (n = 0; n < outcnt; n++) {
+                ch = *out++ = *in++;
+                c = crc_32_tab[((int) c ^ ch) & 0xff] ^ (c >> 8);
+        }
+        crc = c;
+        bytes_out += (ulg) outcnt;
+        output_ptr += (ulg) outcnt;
+        outcnt = 0;
+        puts(".");
+}
+
+static void error(char *x)
+{
+        puts("\n\n");
+        puts(x);
+        puts("\n\n -- System halted");
+
+        while (1) ;             /* Halt */
+}
+
+#define STACK_SIZE (4096)
+long __attribute__ ((aligned(8))) user_stack[STACK_SIZE];
+long *stack_start = &user_stack[STACK_SIZE];
+
+void decompress_kernel(void)
+{
+        output_data = (uch *) (CONFIG_MEMORY_START + 0x2000);
+        free_mem_ptr = (unsigned long) &_end;
+        free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+        makecrc();
+        puts("Uncompressing Linux... ");
+        cache_control(CACHE_ENABLE);
+        gunzip();
+        puts("\n");
+
+#if 0
+        /* When booting from ROM may want to do something like this if the
+         * boot loader doesn't.
+         */
+
+        /* Set up the parameters and command line */
+        {
+                volatile unsigned int *parambase =
+                    (int *) (CONFIG_MEMORY_START + 0x1000);
+
+                parambase[0] = 0x1;     /* MOUNT_ROOT_RDONLY */
+                parambase[1] = 0x0;     /* RAMDISK_FLAGS */
+                parambase[2] = 0x0200;  /* ORIG_ROOT_DEV */
+                parambase[3] = 0x0;     /* LOADER_TYPE */
+                parambase[4] = 0x0;     /* INITRD_START */
+                parambase[5] = 0x0;     /* INITRD_SIZE */
+                parambase[6] = 0;
+
+                strcpy((char *) ((int) parambase + 0x100),
+                       "console=ttySC0,38400");
+        }
+#endif
+
+        puts("Ok, booting the kernel.\n");
+
+        cache_control(CACHE_DISABLE);
+}
diff --git a/arch/sh/boot/compressed/vmlinux_64.lds b/arch/sh/boot/compressed/vmlinux_64.lds
new file mode 100644
index 000000000000..59c2ef4aeda5
--- /dev/null
+++ b/arch/sh/boot/compressed/vmlinux_64.lds
@@ -0,0 +1,64 @@
+/*
+ * ld script to make compressed SuperH/shmedia Linux kernel+decompression
+ *              bootstrap
+ * Modified by Stuart Menefy from arch/sh/vmlinux.lds.S written by Niibe Yutaka
+ */
+
+
+#ifdef CONFIG_LITTLE_ENDIAN
+/* OUTPUT_FORMAT("elf32-sh64l-linux", "elf32-sh64l-linux", "elf32-sh64l-linux") */
+#define NOP 0x6ff0fff0
+#else
+/* OUTPUT_FORMAT("elf32-sh64", "elf32-sh64", "elf32-sh64") */
+#define NOP 0xf0fff06f
+#endif
+
+OUTPUT_FORMAT("elf32-sh64-linux")
+OUTPUT_ARCH(sh)
+ENTRY(_start)
+
+#define ALIGNED_GAP(section, align) (((ADDR(section)+SIZEOF(section)+(align)-1) & ~((align)-1))-ADDR(section))
+#define FOLLOWING(section, align) AT (LOADADDR(section) + ALIGNED_GAP(section,align))
+
+SECTIONS
+{
+  _text = .;                    /* Text and read-only data */
+
+  .text : {
+        *(.text)
+        *(.text64)
+        *(.text..SHmedia32)
+        *(.fixup)
+        *(.gnu.warning)
+        } = NOP
+  . = ALIGN(4);
+  .rodata : { *(.rodata) }
+
+  /* There is no 'real' reason for eight byte alignment, four would work
+   * as well, but gdb downloads much (*4) faster with this.
+   */
+  . = ALIGN(8);
+  .image : { *(.image) }
+  . = ALIGN(4);
+  _etext = .;                   /* End of text section */
+
+  .data :                       /* Data */
+        FOLLOWING(.image, 4)
+        {
+        _data = .;
+        *(.data)
+        }
+  _data_image = LOADADDR(.data);/* Address of data section in ROM */
+
+  _edata = .;                   /* End of data section */
+
+  .stack : { stack = .;  _stack = .; }
+
+  . = ALIGN(4);
+  __bss_start = .;              /* BSS */
+  .bss : {
+        *(.bss)
+        }
+  . = ALIGN(4);
+  _end = . ;
+}