#include <cfg/compiler.h> /* for uintXX_t */
#if CPU_X86
-
- #define CPU_SAVED_REGS_CNT 7
+ #if CPU_X86_32
+ #define CPU_SAVED_REGS_CNT 2
+ #elif CPU_X86_64
+ #define CPU_SAVED_REGS_CNT 8
+ #else
+ #error "unknown CPU"
+ #endif
#define CPU_STACK_GROWS_UPWARD 0
#define CPU_SP_ON_EMPTY_SLOT 0
#elif CPU_ARM
- #define CPU_SAVED_REGS_CNT 10
+ #define CPU_SAVED_REGS_CNT 8
#define CPU_STACK_GROWS_UPWARD 0
#define CPU_SP_ON_EMPTY_SLOT 0
- /**
- * Initialization value for registers in stack frame.
- * The register index is not directly corrispondent to CPU
- * register numbers, but is related to how are pushed to
- * stack (\see asm_switch_context).
- * Index (CPU_SAVED_REGS_CNT - 1) is the CPSR register,
- * the initial value is set to:
- * - All flags (N, Z, C, V) set to 0.
- * - IRQ and FIQ enabled.
- * - ARM state.
- * - CPU in Supervisor Mode (SVC).
- */
- #define CPU_REG_INIT_VALUE(reg) \
- ({ int a = 0; \
- if(reg == 0) \
- a = (int)proc_exit; \
- else if(reg == (CPU_SAVED_REGS_CNT - 1)) \
- a = 0x13; \
- a; \
- })
-
#elif CPU_PPC
#define CPU_SAVED_REGS_CNT 1
#elif CPU_AVR
- #define CPU_SAVED_REGS_CNT 19
+ #define CPU_SAVED_REGS_CNT 18
#define CPU_STACK_GROWS_UPWARD 0
#define CPU_SP_ON_EMPTY_SLOT 1
- /**
- * Initialization value for registers in stack frame.
- * The register index is not directly corrispondent to CPU
- * register numbers. Index 0 is the SREG register: the initial
- * value is all 0 but the interrupt bit (bit 7).
- */
- #define CPU_REG_INIT_VALUE(reg) (reg == 0 ? 0x80 : 0)
-
#else
#error No CPU_... defined.
#endif
/// Default for macro not defined in the right arch section
#ifndef CPU_REG_INIT_VALUE
- #define CPU_REG_INIT_VALUE(reg) 0
+ #define CPU_REG_INIT_VALUE(reg) (reg)
#endif
/*
#endif /* !ARCH_EMUL */
#endif /* !CPU_IDLE */
+/**
+ * Default macro for creating a new Process stack
+ */
+#ifndef CPU_CREATE_NEW_STACK
+
+ #define CPU_CREATE_NEW_STACK(stack) \
+ do { \
+ size_t i; \
+ /* Initialize process stack frame */ \
+ CPU_PUSH_CALL_FRAME(stack, proc_entry); \
+ /* Push a clean set of CPU registers for asm_switch_context() */ \
+ for (i = 0; i < CPU_SAVED_REGS_CNT; i++) \
+ CPU_PUSH_WORD(stack, CPU_REG_INIT_VALUE(i)); \
+ } while (0)
+#endif
+
#endif /* CPU_ATTR_H */