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author | vetch <vetch97@gmail.com> | 2020-01-02 17:54:31 +0100 |
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committer | vetch <vetch97@gmail.com> | 2020-01-02 17:54:31 +0100 |
commit | ab7b754bb32022336527c1a2d5d710b95a589d0e (patch) | |
tree | 19f508f06c72efcbdd2cfad46949ed6f1ae45a3c /psr.h | |
parent | 5e1e6796109c892c4300c3da17c35e7874a40107 (diff) | |
parent | 6bf5a3b8c6e8a5d1cb3fb4880a5d9688ab094c62 (diff) | |
download | rpi-MMU-example-ab7b754bb32022336527c1a2d5d710b95a589d0e.tar.gz rpi-MMU-example-ab7b754bb32022336527c1a2d5d710b95a589d0e.zip |
Merge branch 'bob' of https://repo.or.cz/RPi-MMU-example into alice
# Conflicts:
# .gitignore
# PL0_test.ld
# demo_functionality.c
# interrupt_vector.S
# interrupts.c
# kernel.c
# memory.h
Diffstat (limited to 'psr.h')
-rw-r--r-- | psr.h | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -64,4 +64,25 @@ inline static PSR_t read_CPSR(void) return CPSR; } +inline static void write_CPSR(PSR_t CPSR) +{ + // set content of current program status register + asm("msr cpsr, %0" :: "r" (CPSR.raw) : "memory"); +} + +inline static PSR_t read_SPSR(void) +{ + PSR_t SPSR; + // get content of saved program status register + asm("mrs %0, spsr" : "=r" (SPSR.raw) :: "memory"); + + return SPSR; +} + +inline static void write_SPSR(PSR_t SPSR) +{ + // set content of saved program status register + asm("msr spsr, %0" :: "r" (SPSR.raw)); +} + #endif // PSR_H |