diff options
Diffstat (limited to 'c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h b/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h index 1867ecfbac..02a4544341 100644 --- a/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h +++ b/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h @@ -14,6 +14,9 @@ * D-82178 Puchheim * Germany * rtems@embedded-brains.de + * + * access function for Device Control Registers inspired by "ppc405common.h" + * from Michael Hamel ADInstruments May 2008 * * The license and distribution terms for this file may be found in the file * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE. @@ -189,6 +192,7 @@ static inline void ppc_write_word( uint32_t value, volatile void *dest) ); } + static inline void *ppc_stack_pointer() { void *sp; @@ -301,6 +305,8 @@ static inline void ppc_set_decrementer_register( uint32_t dec) PPC_Set_decrementer( dec); } +#define PPC_STRINGOF(x) #x + /* Do not use the following macros. Use the inline functions instead. */ #define PPC_INTERNAL_MACRO_RETURN_SPECIAL_PURPOSE_REGISTER( spr) \ @@ -324,6 +330,20 @@ static inline void ppc_set_decrementer_register( uint32_t dec) #define PPC_INTERNAL_MACRO_SET_SPECIAL_PURPOSE_REGISTER_EXPAND( spr, val) \ PPC_INTERNAL_MACRO_SET_SPECIAL_PURPOSE_REGISTER( spr, val) +/* + * PPC4xx have Device Control Registers... + */ +#define PPC_DEVICE_CONTROL_REGISTER(dcr) \ + ({uint32_t val;asm volatile ("mfspr %0," PPC_STRINGOF(dcr) \ + : "=r" (val)); val;}) + +#define PPC_SET_DEVICE_CONTROL_REGISTER(dcr,val) \ + do { \ + asm volatile ("mtspr " PPC_STRINGOF(dcr)",%0" \ + :: "r" (val)); \ + } while (0) + + static inline uint32_t ppc_special_purpose_register_0() { PPC_INTERNAL_MACRO_RETURN_SPECIAL_PURPOSE_REGISTER_EXPAND( SPRG0); |