2342aa282b
Directly referencing registers in macros makes assembly code harder to change, because the macros have side effects which are non-obvious. Use the provided 'base' register rather than directly referencing r4. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
41 lines
1 KiB
ArmAsm
41 lines
1 KiB
ArmAsm
/*
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* arch/arm/mach-shark/include/mach/entry-macro.S
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*
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* Low-level IRQ helper macros for Shark platform
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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.macro disable_fiq
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.endm
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.macro get_irqnr_preamble, base, tmp
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mov \base, #0xe0000000
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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mov \irqstat, #0x0C
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strb \irqstat, [\base, #0x20] @outb(0x0C, 0x20) /* Poll command */
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ldrb \irqnr, [\base, #0x20] @irq = inb(0x20) & 7
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and \irqstat, \irqnr, #0x80
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teq \irqstat, #0
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beq 43f
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and \irqnr, \irqnr, #7
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teq \irqnr, #2
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bne 44f
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43: mov \irqstat, #0x0C
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strb \irqstat, [\base, #0xa0] @outb(0x0C, 0xA0) /* Poll command */
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ldrb \irqnr, [\base, #0xa0] @irq = (inb(0xA0) & 7) + 8
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and \irqstat, \irqnr, #0x80
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teq \irqstat, #0
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beq 44f
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and \irqnr, \irqnr, #7
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add \irqnr, \irqnr, #8
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44: teq \irqstat, #0
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.endm
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