Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / m68k / lib / bootm.c

diff --git a/qemu/roms/u-boot/arch/m68k/lib/bootm.c b/qemu/roms/u-boot/arch/m68k/lib/bootm.c
new file mode 100644 (file)
index 0000000..804e01d
--- /dev/null
+++ b/qemu/roms/u-boot/arch/m68k/lib/bootm.c
@@ -0,0 +1,124 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <image.h>
+#include <u-boot/zlib.h>
+#include <bzlib.h>
+#include <watchdog.h>
+#include <environment.h>
+#include <asm/byteorder.h>
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+# include <status_led.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define PHYSADDR(x) x
+
+#define LINUX_MAX_ENVS         256
+#define LINUX_MAX_ARGS         256
+
+static ulong get_sp (void);
+static void set_clocks_in_mhz (bd_t *kbd);
+
+void arch_lmb_reserve(struct lmb *lmb)
+{
+       ulong sp;
+
+       /*
+        * Booting a (Linux) kernel image
+        *
+        * Allocate space for command line and board info - the
+        * address should be as high as possible within the reach of
+        * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
+        * memory, which means far enough below the current stack
+        * pointer.
+        */
+       sp = get_sp();
+       debug ("## Current stack ends at 0x%08lx ", sp);
+
+       /* adjust sp by 1K to be safe */
+       sp -= 1024;
+       lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
+}
+
+int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
+{
+       ulong rd_len;
+       ulong initrd_start, initrd_end;
+       int ret;
+
+       ulong cmd_start, cmd_end;
+       bd_t  *kbd;
+       void  (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
+       struct lmb *lmb = &images->lmb;
+
+       /*
+        * allow the PREP bootm subcommand, it is required for bootm to work
+        */
+       if (flag & BOOTM_STATE_OS_PREP)
+               return 0;
+
+       if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
+               return 1;
+
+       /* allocate space for kernel copy of board info */
+       ret = boot_get_kbd (lmb, &kbd);
+       if (ret) {
+               puts("ERROR with allocation of kernel bd\n");
+               goto error;
+       }
+       set_clocks_in_mhz(kbd);
+
+       ret = image_setup_linux(images);
+       if (ret)
+               goto error;
+
+       kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep;
+
+       debug("## Transferring control to Linux (at address %08lx) ...\n",
+             (ulong) kernel);
+
+       bootstage_mark(BOOTSTAGE_ID_RUN_OS);
+
+       /*
+        * Linux Kernel Parameters (passing board info data):
+        *   sp+00: Ignore, side effect of using jsr to jump to kernel
+        *   sp+04: ptr to board info data
+        *   sp+08: initrd_start or 0 if no initrd
+        *   sp+12: initrd_end - unused if initrd_start is 0
+        *   sp+16: Start of command line string
+        *   sp+20: End   of command line string
+        */
+       (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
+       /* does not return */
+error:
+       return 1;
+}
+
+static ulong get_sp (void)
+{
+       ulong sp;
+
+       asm("movel %%a7, %%d0\n"
+           "movel %%d0, %0\n": "=d"(sp): :"%d0");
+
+       return sp;
+}
+
+static void set_clocks_in_mhz (bd_t *kbd)
+{
+       char *s;
+
+       if ((s = getenv("clocks_in_mhz")) != NULL) {
+               /* convert all clock information to MHz */
+               kbd->bi_intfreq /= 1000000L;
+               kbd->bi_busfreq /= 1000000L;
+       }
+}