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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-12-23 09:53:43 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2015-01-09 14:03:34 +0100 |
commit | 71b611d172251f4a86fe6e45373cab082371b727 (patch) | |
tree | c477f904e02692a86c8901dc6dff275ef476fcaf /c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/vectors.h | |
parent | bsps/powerpc: Add TMR access macros (diff) | |
download | rtems-71b611d172251f4a86fe6e45373cab082371b727.tar.bz2 |
bsps/powerpc: ppc_exc_initialize_interrupt_stack()
Diffstat (limited to 'c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/vectors.h')
-rw-r--r-- | c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/vectors.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/vectors.h b/c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/vectors.h index 9e5f466f75..bf13c757f1 100644 --- a/c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/vectors.h +++ b/c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/vectors.h @@ -355,6 +355,25 @@ rtems_status_code ppc_exc_make_prologue( size_t *prologue_size ); +static inline void ppc_exc_initialize_interrupt_stack( + uintptr_t stack_begin, + uintptr_t stack_size +) +{ + uintptr_t stack_end = stack_begin + stack_size; + uintptr_t stack_pointer = stack_end - PPC_MINIMUM_STACK_FRAME_SIZE; + + /* Ensure proper interrupt stack alignment */ + stack_pointer &= ~((uintptr_t) CPU_STACK_ALIGNMENT - 1); + + /* Tag interrupt stack bottom */ + *(uint32_t *) stack_pointer = 0; + + /* Move interrupt stack values to special purpose registers */ + PPC_SET_SPECIAL_PURPOSE_REGISTER(SPRG1, stack_pointer); + PPC_SET_SPECIAL_PURPOSE_REGISTER(SPRG2, stack_begin); +} + /** * @brief Initializes the exception handling. * |