diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2007-02-16 22:16:32 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-02-17 15:04:29 +0000 |
| commit | f80dff9da07d81da16e3b842118d47b9febf9c01 (patch) | |
| tree | ea2da17c5af516c241b3ea3b4dd4fa47d9d86769 /include/asm-arm/arch-at91rm9200/entry-macro.S | |
| parent | 588ef7693574cfbcb228f48d5478c2b39a9b0c9f (diff) | |
[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user
get_irqnr_preamble allows machines to take some action before entering the
get_irqnr_and_base loop. On iop we enable cp6 access.
arch_ret_to_user is added to the userspace return path to allow individual
architectures to take actions, like disabling coprocessor access, before
the final return to userspace.
Per Nicolas Pitre's note, there is no need to cp_wait on the return to user
as the latency to return is sufficient.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm/arch-at91rm9200/entry-macro.S')
| -rw-r--r-- | include/asm-arm/arch-at91rm9200/entry-macro.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/asm-arm/arch-at91rm9200/entry-macro.S b/include/asm-arm/arch-at91rm9200/entry-macro.S index 57248a79647..0e0aadf2a17 100644 --- a/include/asm-arm/arch-at91rm9200/entry-macro.S +++ b/include/asm-arm/arch-at91rm9200/entry-macro.S @@ -16,6 +16,12 @@ .macro disable_fiq .endm + .macro get_irqnr_preamble, base, tmp + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + .endm + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp ldr \base, =(AT91_VA_BASE_SYS) @ base virtual address of SYS peripherals ldr \irqnr, [\base, #AT91_AIC_IVR] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt) |