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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2018-03-14 10:59:50 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-03-29 08:16:40 +0200 |
| commit | c4b8db33b1ed2ef4cbd0993c9f4d726e152bf872 (patch) | |
| tree | f3f73c12f7ebf66080e1b820d9f5c760771d9e7e | |
| parent | dd9b525b2d92797c25660391829efedc4827c819 (diff) | |
| download | barebox-c4b8db33b1ed2ef4cbd0993c9f4d726e152bf872.tar.gz barebox-c4b8db33b1ed2ef4cbd0993c9f4d726e152bf872.tar.xz | |
ARM: aarch64: Allow to leave exceptions
So far exceptions can only be entered but never left. Add code to leave
exceptions based on U-Boot commit 4c2cc7c4e (arm64: Allow exceptions to return).
This will be useful to implement ignoring data aborts on a 'md' command.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/cpu/exceptions_64.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/cpu/exceptions_64.S b/arch/arm/cpu/exceptions_64.S index a7069a8475..58ca50b709 100644 --- a/arch/arm/cpu/exceptions_64.S +++ b/arch/arm/cpu/exceptions_64.S @@ -80,34 +80,68 @@ vectors: _do_bad_sync: exception_entry bl do_bad_sync + b exception_exit _do_bad_irq: exception_entry bl do_bad_irq + b exception_exit _do_bad_fiq: exception_entry bl do_bad_fiq + b exception_exit _do_bad_error: exception_entry bl do_bad_error + b exception_exit _do_sync: exception_entry bl do_sync + b exception_exit _do_irq: exception_entry bl do_irq + b exception_exit _do_fiq: exception_entry bl do_fiq + b exception_exit _do_error: exception_entry bl do_error + b exception_exit + +exception_exit: + ldp x2, x0, [sp],#16 + switch_el x11, 3f, 2f, 1f +3: msr elr_el3, x2 + b 0f +2: msr elr_el2, x2 + b 0f +1: msr elr_el1, x2 +0: + ldp x1, x2, [sp],#16 + ldp x3, x4, [sp],#16 + ldp x5, x6, [sp],#16 + ldp x7, x8, [sp],#16 + ldp x9, x10, [sp],#16 + ldp x11, x12, [sp],#16 + ldp x13, x14, [sp],#16 + ldp x15, x16, [sp],#16 + ldp x17, x18, [sp],#16 + ldp x19, x20, [sp],#16 + ldp x21, x22, [sp],#16 + ldp x23, x24, [sp],#16 + ldp x25, x26, [sp],#16 + ldp x27, x28, [sp],#16 + ldp x29, x30, [sp],#16 + eret .section .data .align 4 |