kernel_optimize_test/include/asm-arm/arch-omap/entry-macro.S
Dan Williams f80dff9da0 [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>
2007-02-17 15:04:29 +00:00

83 lines
2.0 KiB
ArmAsm

/*
* include/asm-arm/arch-omap/entry-macro.S
*
* Low-level IRQ helper macros for OMAP-based platforms
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <asm/hardware.h>
#include <asm/arch/irqs.h>
#if defined(CONFIG_ARCH_OMAP1)
#if defined(CONFIG_ARCH_OMAP730) && \
(defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX))
#error "FIXME: OMAP730 doesn't support multiple-OMAP"
#elif defined(CONFIG_ARCH_OMAP730)
#define INT_IH2_IRQ INT_730_IH2_IRQ
#elif defined(CONFIG_ARCH_OMAP15XX)
#define INT_IH2_IRQ INT_1510_IH2_IRQ
#elif defined(CONFIG_ARCH_OMAP16XX)
#define INT_IH2_IRQ INT_1610_IH2_IRQ
#else
#warning "IH2 IRQ defaulted"
#define INT_IH2_IRQ INT_1510_IH2_IRQ
#endif
.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, =IO_ADDRESS(OMAP_IH1_BASE)
ldr \irqnr, [\base, #IRQ_ITR_REG_OFFSET]
ldr \tmp, [\base, #IRQ_MIR_REG_OFFSET]
mov \irqstat, #0xffffffff
bic \tmp, \irqstat, \tmp
tst \irqnr, \tmp
beq 1510f
ldr \irqnr, [\base, #IRQ_SIR_FIQ_REG_OFFSET]
cmp \irqnr, #0
ldreq \irqnr, [\base, #IRQ_SIR_IRQ_REG_OFFSET]
cmpeq \irqnr, #INT_IH2_IRQ
ldreq \base, =IO_ADDRESS(OMAP_IH2_BASE)
ldreq \irqnr, [\base, #IRQ_SIR_IRQ_REG_OFFSET]
addeqs \irqnr, \irqnr, #32
1510:
.endm
#elif defined(CONFIG_ARCH_OMAP24XX)
#include <asm/arch/omap24xx.h>
.macro disable_fiq
.endm
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \base, =VA_IC_BASE
ldr \irqnr, [\base, #0x98] /* IRQ pending reg 1 */
cmp \irqnr, #0x0
bne 2222f
ldr \irqnr, [\base, #0xb8] /* IRQ pending reg 2 */
cmp \irqnr, #0x0
bne 2222f
ldr \irqnr, [\base, #0xd8] /* IRQ pending reg 3 */
cmp \irqnr, #0x0
2222:
ldrne \irqnr, [\base, #IRQ_SIR_IRQ]
.endm
.macro irq_prio_table
.endm
#endif