Merge branch 'master' of git://git.denx.de/u-boot-arm

[oweals/u-boot.git] / include / asm-blackfin / mach-common / bits / bootrom.h

diff --git a/include/asm-blackfin/mach-common/bits/bootrom.h b/include/asm-blackfin/mach-common/bits/bootrom.h
index 6cdaa4f894429b43e0940cebf8ba3f6841b7240c..fb97ff81b3b3fccefd3fcc0ee4464b88f5ab97f2 100644 (file)
--- a/include/asm-blackfin/mach-common/bits/bootrom.h
+++ b/include/asm-blackfin/mach-common/bits/bootrom.h
@@ -88,27 +88,42 @@
 #define _BOOTROM_REV                   0xEF000040
 #define _BOOTROM_SESR                  0xEF001000
 
+#define BOOTROM_FOLLOWS_C_ABI 1
+
 #define BOOTROM_CAPS_ADI_BOOT_STRUCTS 1
 
-/* Not available on initial BF54x or BF52x */
-#if (defined(__ADSPBF54x__) && __SILICON_REVISION__ < 1) || \
-    (defined(__ADSPBF52x__) && __SILICON_REVISION__ < 2)
-#define BOOTROM_CAPS_SYSCONTROL 0
-#else
-#define BOOTROM_CAPS_SYSCONTROL 1
 #endif
 
+#ifndef BOOTROM_FOLLOWS_C_ABI
+#define BOOTROM_FOLLOWS_C_ABI 0
 #endif
-
 #ifndef BOOTROM_CAPS_ADI_BOOT_STRUCTS
 #define BOOTROM_CAPS_ADI_BOOT_STRUCTS 0
 #endif
-#ifndef BOOTROM_CAPS_SYSCONTROL
-#define BOOTROM_CAPS_SYSCONTROL 0
-#endif
+
+/* Possible syscontrol action flags */
+#define SYSCTRL_READ        0x00000000    /* read registers */
+#define SYSCTRL_WRITE       0x00000001    /* write registers */
+#define SYSCTRL_SYSRESET    0x00000002    /* perform system reset */
+#define SYSCTRL_CORERESET   0x00000004    /* perform core reset */
+#define SYSCTRL_SOFTRESET   0x00000006    /* perform core and system reset */
+#define SYSCTRL_VRCTL       0x00000010    /* read/write VR_CTL register */
+#define SYSCTRL_EXTVOLTAGE  0x00000020    /* VDDINT supplied externally */
+#define SYSCTRL_INTVOLTAGE  0x00000000    /* VDDINT generated by on-chip regulator */
+#define SYSCTRL_OTPVOLTAGE  0x00000040    /* For Factory Purposes Only */
+#define SYSCTRL_PLLCTL      0x00000100    /* read/write PLL_CTL register */
+#define SYSCTRL_PLLDIV      0x00000200    /* read/write PLL_DIV register */
+#define SYSCTRL_LOCKCNT     0x00000400    /* read/write PLL_LOCKCNT register */
+#define SYSCTRL_PLLSTAT     0x00000800    /* read/write PLL_STAT register */
 
 #ifndef __ASSEMBLY__
 
+#if BOOTROM_FOLLOWS_C_ABI
+# define BOOTROM_CALLED_FUNC_ATTR
+#else
+# define BOOTROM_CALLED_FUNC_ATTR __attribute__((saveall))
+#endif
+
 /* Structures for the syscontrol() function */
 typedef struct ADI_SYSCTRL_VALUES {
        uint16_t uwVrCtl;
@@ -121,25 +136,26 @@ typedef struct ADI_SYSCTRL_VALUES {
 #ifndef _BOOTROM_SYSCONTROL
 #define _BOOTROM_SYSCONTROL 0
 #endif
-static uint32_t (* const syscontrol)(uint32_t action_flags, ADI_SYSCTRL_VALUES *power_settings, void *reserved) = (void *)_BOOTROM_SYSCONTROL;
-
-#endif /* __ASSEMBLY__ */
-
-/* Possible syscontrol action flags */
-#define SYSCTRL_READ        0x00000000    /* read registers */
-#define SYSCTRL_WRITE       0x00000001    /* write registers */
-#define SYSCTRL_SYSRESET    0x00000002    /* perform system reset */
-#define SYSCTRL_SOFTRESET   0x00000004    /* perform core and system reset */
-#define SYSCTRL_VRCTL       0x00000010    /* read/write VR_CTL register */
-#define SYSCTRL_EXTVOLTAGE  0x00000020    /* VDDINT supplied externally */
-#define SYSCTRL_INTVOLTAGE  0x00000000    /* VDDINT generated by on-chip regulator */
-#define SYSCTRL_OTPVOLTAGE  0x00000040    /* For Factory Purposes Only */
-#define SYSCTRL_PLLCTL      0x00000100    /* read/write PLL_CTL register */
-#define SYSCTRL_PLLDIV      0x00000200    /* read/write PLL_DIV register */
-#define SYSCTRL_LOCKCNT     0x00000400    /* read/write PLL_LOCKCNT register */
-#define SYSCTRL_PLLSTAT     0x00000800    /* read/write PLL_STAT register */
+static uint32_t (* const bfrom_SysControl)(uint32_t action_flags, ADI_SYSCTRL_VALUES *power_settings, void *reserved) = (void *)_BOOTROM_SYSCONTROL;
 
-#ifndef __ASSEMBLY__
+/* We need a dedicated function since we need to screw with the stack pointer
+ * when resetting.  The on-chip ROM will save/restore registers on the stack
+ * when doing a system reset, so the stack cannot be outside of the chip.
+ */
+__attribute__((__noreturn__))
+static inline void bfrom_SoftReset(void *new_stack)
+{
+       while (1)
+               __asm__ __volatile__(
+                       "sp = %[stack];"
+                       "jump (%[bfrom_syscontrol]);"
+                       : : [bfrom_syscontrol] "p"(bfrom_SysControl),
+                               "q0"(SYSCTRL_SOFTRESET),
+                               "q1"(0),
+                               "q2"(NULL),
+                               [stack] "p"(new_stack)
+               );
+}
 
 /* Structures for working with LDRs and boot rom callbacks */
 typedef struct ADI_BOOT_HEADER {