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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2018-03-14 11:08:45 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-03-29 08:16:41 +0200 |
| commit | 1a257333208d3e2790c872f0cefaaea4fe09bcc9 (patch) | |
| tree | 90022abb361968f7a45195f8b28d7d1caec71fce | |
| parent | 726f3e2403f0cd30a5c5fc7bdb84ac6c1e18cbc2 (diff) | |
| download | barebox-1a257333208d3e2790c872f0cefaaea4fe09bcc9.tar.gz barebox-1a257333208d3e2790c872f0cefaaea4fe09bcc9.tar.xz | |
ARM: aarch64: implement ignoring data aborts
Data aborts can be masked using the data_abort_mask() function.
Add the missing pieces for functionality on aarch64 so that the
'md' command is safe to call even with faulting addresses.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/cpu/interrupts_64.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/arm/cpu/interrupts_64.c b/arch/arm/cpu/interrupts_64.c index ee3dc3380b..32c8dfcb2d 100644 --- a/arch/arm/cpu/interrupts_64.c +++ b/arch/arm/cpu/interrupts_64.c @@ -143,8 +143,18 @@ void do_bad_error(struct pt_regs *pt_regs) do_exception(pt_regs); } +extern volatile int arm_ignore_data_abort; +extern volatile int arm_data_abort_occurred; + void do_sync(struct pt_regs *pt_regs, unsigned int esr, unsigned long far) { + if ((esr >> ESR_ELx_EC_SHIFT) == ESR_ELx_EC_DABT_CUR && + arm_ignore_data_abort) { + arm_data_abort_occurred = 1; + pt_regs->elr += 4; + return; + } + printf("%s exception at 0x%016lx\n", esr_get_class_string(esr), far); do_exception(pt_regs); } @@ -156,9 +166,6 @@ void do_error(struct pt_regs *pt_regs) do_exception(pt_regs); } -extern volatile int arm_ignore_data_abort; -extern volatile int arm_data_abort_occurred; - void data_abort_mask(void) { arm_data_abort_occurred = 0; |