[PATCH] m68knommu: optimized local_irq_disable, and platform reboot code

Switch to a space optimized version of local_irq_disable() for ColdFire
platforms. Also add reboot support for the Freescale M5272 platform.
Patch originally submitted by Philippe De Muyter <phdm@macqel.be>.

Add reboot support for the Freescale M523x ColdFire platform. Patch originally
submitted by Jate Sujjavanich.

Signed-off-by: Greg Ungerer <gerg@uclinux.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 48 insertions, 6 deletions

diff --git a/include/asm-m68knommu/system.h b/include/asm-m68knommu/system.h
index c341b66c147b..53cbbad0f130 100644
--- a/include/asm-m68knommu/system.h
+++ b/include/asm-m68knommu/system.h
@@ -57,9 +57,18 @@ asmlinkage void resume(void);
         : "cc", "%d0", "memory")
 #define local_irq_disable() __asm__ __volatile__ (              \
         "move %/sr,%%d0\n\t"                                    \
-        "ori.l  #0x0700,%%d0\n\t"                               \
+        "ori.l #0x0700,%%d0\n\t"                                \
         "move %%d0,%/sr\n"                                      \
-        : /* no inputs */                                       \
+        : /* no outputs */                                      \
+        :                                                       \
+        : "cc", "%d0", "memory")
+/* For spinlocks etc */
+#define local_irq_save(x) __asm__ __volatile__ (                \
+        "movew %%sr,%0\n\t"                                     \
+        "movew #0x0700,%%d0\n\t"                                \
+        "or.l  %0,%%d0\n\t"                                     \
+        "movew %%d0,%/sr"                                       \
+        : "=d" (x)                                              \
         :                                                       \
         : "cc", "%d0", "memory")
 #else
@@ -75,7 +84,9 @@ asmlinkage void resume(void);
 #define local_irq_restore(x) asm volatile ("movew %0,%%sr": :"d" (x) : "memory")
 
 /* For spinlocks etc */
+#ifndef local_irq_save
 #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } while (0)
+#endif
 
 #define irqs_disabled()                 \
 ({                                      \
@@ -234,9 +245,9 @@ cmpxchg(volatile int *p, int old, int new)
 #ifdef CONFIG_COLDFIRE
 #if defined(CONFIG_M5272) && defined(CONFIG_NETtel)
 /*
- *      Need to account for broken early mask of 5272 silicon. So don't
- *      jump through the original start address. Jump strait into the
- *      known start of the FLASH code.
+ * Need to account for broken early mask of 5272 silicon. So don't
+ * jump through the original start address. Jump strait into the
+ * known start of the FLASH code.
  */
 #define HARD_RESET_NOW() ({             \
         asm("                           \
@@ -244,7 +255,9 @@ cmpxchg(volatile int *p, int old, int new)
         jmp 0xf0000400;                 \
         ");                             \
 })
-#elif defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || defined(CONFIG_DISKtel) || defined(CONFIG_SECUREEDGEMP3) || defined(CONFIG_CLEOPATRA)
+#elif defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || \
+      defined(CONFIG_DISKtel) || defined(CONFIG_SECUREEDGEMP3) || \
+      defined(CONFIG_CLEOPATRA)
 #define HARD_RESET_NOW() ({             \
         asm("                           \
         movew #0x2700, %sr;             \
@@ -257,6 +270,26 @@ cmpxchg(volatile int *p, int old, int new)
         jmp (%a0);                      \
         ");                             \
 })
+#elif defined(CONFIG_M5272)
+/*
+ * Retrieve the boot address in flash using CSBR0 and CSOR0
+ * find the reset vector at flash_address + 4 (e.g. 0x400)
+ * remap it in the flash's current location (e.g. 0xf0000400)
+ * and jump there.
+ */ 
+#define HARD_RESET_NOW() ({             \
+        asm("                           \
+        movew #0x2700, %%sr;            \
+        move.l  %0+0x40,%%d0;           \
+        and.l   %0+0x44,%%d0;           \
+        andi.l  #0xfffff000,%%d0;       \
+        mov.l   %%d0,%%a0;              \
+        or.l    4(%%a0),%%d0;           \
+        mov.l   %%d0,%%a0;              \
+        jmp (%%a0);"                    \
+        : /* No output */               \
+        : "o" (*(char *)MCF_MBAR) );    \
+})
 #elif defined(CONFIG_M528x)
 /*
  * The MCF528x has a bit (SOFTRST) in memory (Reset Control Register RCR),
@@ -270,6 +303,15 @@ cmpxchg(volatile int *p, int old, int new)
         while(1)                                \
         *reset |= (0x01 << 7);\
 })
+#elif defined(CONFIG_M523x)
+#define HARD_RESET_NOW() ({             \
+        asm("                           \
+        movew #0x2700, %sr;             \
+        movel #0x01000000, %sp;         \
+        moveal #0x40110000, %a0;        \
+        moveb #0x80, (%a0);             \
+        ");                             \
+})
 #else
 #define HARD_RESET_NOW() ({             \
         asm("                           \