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exo: fix SE driver coherency bug (closes #384)

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This commit is contained in:
Michael Scire 2019-03-14 13:07:54 -07:00
parent 991fe78740
commit 3fcad4bc65
1 changed files with 5 additions and 0 deletions
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5
exosphere/src/se.c
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@ -315,6 +315,7 @@ void se_aes_crypt_insecure_internal(unsigned int keyslot, uint32_t out_ll_paddr,
se->ERR_STATUS_REG = se->ERR_STATUS_REG;
se->INT_STATUS_REG = se->INT_STATUS_REG;
se->OPERATION_REG = 1;
(void)(se->OPERATION_REG);
/* Ensure writes go through. */
__dsb_ish();
@ -477,6 +478,7 @@ void trigger_se_rsa_op(void *buf, size_t size) {
se->ERR_STATUS_REG = se->ERR_STATUS_REG;
se->INT_STATUS_REG = se->INT_STATUS_REG;
se->OPERATION_REG = 1;
(void)(se->OPERATION_REG);
/* Ensure writes go through. */
__dsb_ish();
@ -500,6 +502,9 @@ void trigger_se_blocking_op(unsigned int op, void *dst, size_t dst_size, const v
se->ERR_STATUS_REG = se->ERR_STATUS_REG;
se->INT_STATUS_REG = se->INT_STATUS_REG;
se->OPERATION_REG = op;
(void)(se->OPERATION_REG);
__dsb_ish();
while (!(se->INT_STATUS_REG & 0x10)) { /* Wait a while */ }