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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2022-12-22 10:52:11 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2023-01-03 09:01:46 +0100 |
| commit | 0e052bcb3e5ed811e1e6c35239882fbcf9098d7d (patch) | |
| tree | 55c4fa6134106d3cac7257bc6bde714d6d963695 /bsps | |
| parent | bsp/qoriq: Support message signaled interrupts (diff) | |
| download | rtems-0e052bcb3e5ed811e1e6c35239882fbcf9098d7d.tar.bz2 | |
bsp/qoriq: Add qoriq_mmu_find_free_tlb1_entry()
Diffstat (limited to 'bsps')
| -rw-r--r-- | bsps/powerpc/qoriq/include/bsp/mmu.h | 2 | ||||
| -rw-r--r-- | bsps/powerpc/qoriq/start/mmu.c | 26 |
2 files changed, 27 insertions, 1 deletions
diff --git a/bsps/powerpc/qoriq/include/bsp/mmu.h b/bsps/powerpc/qoriq/include/bsp/mmu.h index e9aad505b5..2a69f683bc 100644 --- a/bsps/powerpc/qoriq/include/bsp/mmu.h +++ b/bsps/powerpc/qoriq/include/bsp/mmu.h @@ -91,6 +91,8 @@ void qoriq_mmu_write_to_tlb1(qoriq_mmu_context *self, int first_tlb); void qoriq_mmu_change_perm(uint32_t test, uint32_t set, uint32_t clear); +int qoriq_mmu_find_free_tlb1_entry(void); + void qoriq_mmu_config(bool boot_processor, int first_tlb, int scratch_tlb); void qoriq_tlb1_write( diff --git a/bsps/powerpc/qoriq/start/mmu.c b/bsps/powerpc/qoriq/start/mmu.c index fa24357852..e2b4009ac6 100644 --- a/bsps/powerpc/qoriq/start/mmu.c +++ b/bsps/powerpc/qoriq/start/mmu.c @@ -358,12 +358,14 @@ void qoriq_mmu_change_perm(uint32_t test, uint32_t set, uint32_t clear) { int i = 0; - for (i = 0; i < 16; ++i) { + for (i = 0; i < QORIQ_TLB1_ENTRY_COUNT; ++i) { uint32_t mas0 = FSL_EIS_MAS0_TLBSEL | FSL_EIS_MAS0_ESEL(i); uint32_t mas1 = 0; PPC_SET_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS0, mas0); + ppc_synchronize_instructions(); ppc_tlbre(); + ppc_synchronize_instructions(); mas1 = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS1); if ((mas1 & FSL_EIS_MAS1_V) != 0) { @@ -382,3 +384,25 @@ void qoriq_mmu_change_perm(uint32_t test, uint32_t set, uint32_t clear) } } } + +int qoriq_mmu_find_free_tlb1_entry(void) +{ + int i = 0; + + for (i = 0; i < QORIQ_TLB1_ENTRY_COUNT; ++i) { + uint32_t mas0 = FSL_EIS_MAS0_TLBSEL | FSL_EIS_MAS0_ESEL(i); + uint32_t mas1; + + PPC_SET_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS0, mas0); + ppc_synchronize_instructions(); + ppc_tlbre(); + ppc_synchronize_instructions(); + + mas1 = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS1); + if ((mas1 & FSL_EIS_MAS1_V) == 0) { + return i; + } + } + + return -1; +} |