diff options
Diffstat (limited to 'include/asm-blackfin/mach-common/bits/bootrom.h')
| -rw-r--r-- | include/asm-blackfin/mach-common/bits/bootrom.h | 72 |
1 files changed, 44 insertions, 28 deletions
diff --git a/include/asm-blackfin/mach-common/bits/bootrom.h b/include/asm-blackfin/mach-common/bits/bootrom.h index 6cdaa4f894..fb97ff81b3 100644 --- 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 { |