35 lines
850 B
C
35 lines
850 B
C
#ifndef PPC_CONTEXT_H
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#define PPC_CONTEXT_H
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struct context {
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#define SP_LOC(ctx) (&(ctx)->sp)
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unsigned long _sp;
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unsigned long return_addr;
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unsigned long sp;
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unsigned long pc;
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/* General registers */
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unsigned long regs[34];
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#define REG_R3 3
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#define REG_R4 7
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#define REG_R5 8
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#define REG_R6 9
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#define REG_R7 10
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/* Flags */
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/* Optional stack contents */
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unsigned long param[0];
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};
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/* Create a new context in the given stack */
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struct context *
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init_context(uint8_t *stack, uint32_t stack_size, int num_param);
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/* Switch context */
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struct context *switch_to(struct context *);
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/* Holds physical address of boot context */
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extern unsigned long __boot_ctx;
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/* This can always be safely used to refer to the boot context */
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#define boot_ctx ((struct context *) phys_to_virt(__boot_ctx))
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#endif /* PPC_CONTEXT_H */
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