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-rw-r--r--arch/parisc/boot/compressed/misc.c301
1 files changed, 301 insertions, 0 deletions
diff --git a/arch/parisc/boot/compressed/misc.c b/arch/parisc/boot/compressed/misc.c
new file mode 100644
index 000000000000..13a4bf9ac4da
--- /dev/null
+++ b/arch/parisc/boot/compressed/misc.c
@@ -0,0 +1,301 @@
+/*
+ * Definitions and wrapper functions for kernel decompressor
+ *
+ * (C) 2017 Helge Deller <deller@gmx.de>
+ */
+
+#include <linux/uaccess.h>
+#include <asm/unaligned.h>
+#include <asm/page.h>
+#include "sizes.h"
+
+/*
+ * gzip declarations
+ */
+#define STATIC static
+
+#undef memmove
+#define memmove memmove
+#define memzero(s, n) memset((s), 0, (n))
+
+#define malloc malloc_gzip
+#define free free_gzip
+
+/* Symbols defined by linker scripts */
+extern char input_data[];
+extern int input_len;
+extern __le32 output_len; /* at unaligned address, little-endian */
+extern char _text, _end;
+extern char _bss, _ebss;
+extern char _startcode_end;
+extern void startup_continue(void *entry, unsigned long cmdline,
+ unsigned long rd_start, unsigned long rd_end) __noreturn;
+
+void error(char *m) __noreturn;
+
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+ const char *s = src;
+ char *d = dest;
+
+ if (d <= s) {
+ while (n--)
+ *d++ = *s++;
+ } else {
+ d += n;
+ s += n;
+ while (n--)
+ *--d = *--s;
+ }
+ return dest;
+}
+
+void *memset(void *s, int c, size_t count)
+{
+ char *xs = (char *)s;
+
+ while (count--)
+ *xs++ = c;
+ return s;
+}
+
+void *memcpy(void *d, const void *s, size_t len)
+{
+ char *dest = (char *)d;
+ const char *source = (const char *)s;
+
+ while (len--)
+ *dest++ = *source++;
+ return d;
+}
+
+size_t strlen(const char *s)
+{
+ const char *sc;
+
+ for (sc = s; *sc != '\0'; ++sc)
+ ;
+ return sc - s;
+}
+
+char *strchr(const char *s, int c)
+{
+ while (*s) {
+ if (*s == (char)c)
+ return (char *)s;
+ ++s;
+ }
+ return NULL;
+}
+
+int puts(const char *s)
+{
+ const char *nuline = s;
+
+ while ((nuline = strchr(s, '\n')) != NULL) {
+ if (nuline != s)
+ pdc_iodc_print(s, nuline - s);
+ pdc_iodc_print("\r\n", 2);
+ s = nuline + 1;
+ }
+ if (*s != '\0')
+ pdc_iodc_print(s, strlen(s));
+
+ return 0;
+}
+
+static int putchar(int c)
+{
+ char buf[2];
+
+ buf[0] = c;
+ buf[1] = '\0';
+ puts(buf);
+ return c;
+}
+
+void __noreturn error(char *x)
+{
+ puts("\n\n");
+ puts(x);
+ puts("\n\n -- System halted");
+ while (1) /* wait forever */
+ ;
+}
+
+static int print_hex(unsigned long num)
+{
+ const char hex[] = "0123456789abcdef";
+ char str[40];
+ int i = sizeof(str)-1;
+
+ str[i--] = '\0';
+ do {
+ str[i--] = hex[num & 0x0f];
+ num >>= 4;
+ } while (num);
+
+ str[i--] = 'x';
+ str[i] = '0';
+ puts(&str[i]);
+
+ return 0;
+}
+
+int printf(const char *fmt, ...)
+{
+ va_list args;
+ int i = 0;
+
+ va_start(args, fmt);
+
+ while (fmt[i]) {
+ if (fmt[i] != '%') {
+put:
+ putchar(fmt[i++]);
+ continue;
+ }
+
+ if (fmt[++i] == '%')
+ goto put;
+ ++i;
+ print_hex(va_arg(args, unsigned long));
+ }
+
+ va_end(args);
+ return 0;
+}
+
+/* helper functions for libgcc */
+void abort(void)
+{
+ error("aborted.");
+}
+
+#undef malloc
+void *malloc(size_t size)
+{
+ return malloc_gzip(size);
+}
+
+#undef free
+void free(void *ptr)
+{
+ return free_gzip(ptr);
+}
+
+
+static void flush_data_cache(char *start, unsigned long length)
+{
+ char *end = start + length;
+
+ do {
+ asm volatile("fdc 0(%0)" : : "r" (start));
+ asm volatile("fic 0(%%sr0,%0)" : : "r" (start));
+ start += 16;
+ } while (start < end);
+ asm volatile("fdc 0(%0)" : : "r" (end));
+
+ asm ("sync");
+}
+
+unsigned long decompress_kernel(unsigned int started_wide,
+ unsigned int command_line,
+ const unsigned int rd_start,
+ const unsigned int rd_end)
+{
+ char *output;
+ unsigned long len, len_all;
+
+#ifdef CONFIG_64BIT
+ parisc_narrow_firmware = 0;
+#endif
+
+ set_firmware_width_unlocked();
+
+ putchar('U'); /* if you get this p and no more, string storage */
+ /* in $GLOBAL$ is wrong or %dp is wrong */
+ puts("ncompressing ...\n");
+
+ output = (char *) KERNEL_BINARY_TEXT_START;
+ len_all = __pa(SZ_end) - __pa(SZparisc_kernel_start);
+
+ if ((unsigned long) &_startcode_end > (unsigned long) output)
+ error("Bootcode overlaps kernel code");
+
+ len = get_unaligned_le32(&output_len);
+ if (len > len_all)
+ error("Output len too big.");
+ else
+ memset(&output[len], 0, len_all - len);
+
+ /*
+ * Initialize free_mem_ptr and free_mem_end_ptr.
+ */
+ free_mem_ptr = (unsigned long) &_ebss;
+ free_mem_ptr += 2*1024*1024; /* leave 2 MB for stack */
+
+ /* Limit memory for bootoader to 1GB */
+ #define ARTIFICIAL_LIMIT (1*1024*1024*1024)
+ free_mem_end_ptr = PAGE0->imm_max_mem;
+ if (free_mem_end_ptr > ARTIFICIAL_LIMIT)
+ free_mem_end_ptr = ARTIFICIAL_LIMIT;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /* if we have ramdisk this is at end of memory */
+ if (rd_start && rd_start < free_mem_end_ptr)
+ free_mem_end_ptr = rd_start;
+#endif
+
+#ifdef DEBUG
+ printf("startcode_end = %x\n", &_startcode_end);
+ printf("commandline = %x\n", command_line);
+ printf("rd_start = %x\n", rd_start);
+ printf("rd_end = %x\n", rd_end);
+
+ printf("free_ptr = %x\n", free_mem_ptr);
+ printf("free_ptr_end = %x\n", free_mem_end_ptr);
+
+ printf("input_data = %x\n", input_data);
+ printf("input_len = %x\n", input_len);
+ printf("output = %x\n", output);
+ printf("output_len = %x\n", len);
+ printf("output_max = %x\n", len_all);
+#endif
+
+ __decompress(input_data, input_len, NULL, NULL,
+ output, 0, NULL, error);
+
+ flush_data_cache(output, len);
+
+ printf("Booting kernel ...\n\n");
+
+ return (unsigned long) output;
+}