150 lines
4.0 KiB
ArmAsm
150 lines
4.0 KiB
ArmAsm
/*
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* arch/arm/mach-lh7a40x/include/mach/entry-macro.S
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*
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* Low-level IRQ helper macros for LH7A40x platforms
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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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#include <mach/hardware.h>
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#include <mach/irqs.h>
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/* In order to allow there to be support for both of the processor
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classes at the same time, we make a hack here that isn't very
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pretty. At startup, the link pointed to with the
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branch_irq_lh7a400 symbol is replaced with a NOP when the CPU is
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detected as a lh7a404.
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*** FIXME: we should clean this up so that there is only one
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implementation for each CPU's design.
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*/
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#if defined (CONFIG_ARCH_LH7A400) && defined (CONFIG_ARCH_LH7A404)
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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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.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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branch_irq_lh7a400: b 1000f
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@ Implementation of the LH7A404 get_irqnr_and_base.
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mov \irqnr, #0 @ VIC1 irq base
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mov \base, #io_p2v(0x80000000) @ APB registers
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add \base, \base, #0x8000
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ldr \tmp, [\base, #0x0030] @ VIC1_VECTADDR
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tst \tmp, #VA_VECTORED @ Direct vectored
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bne 1002f
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tst \tmp, #VA_VIC1DEFAULT @ Default vectored VIC1
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ldrne \irqstat, [\base, #0] @ VIC1_IRQSTATUS
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bne 1001f
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add \base, \base, #(0xa000 - 0x8000)
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ldr \tmp, [\base, #0x0030] @ VIC2_VECTADDR
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tst \tmp, #VA_VECTORED @ Direct vectored
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bne 1002f
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ldr \irqstat, [\base, #0] @ VIC2_IRQSTATUS
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mov \irqnr, #32 @ VIC2 irq base
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1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry
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bcs 1008f @ Bit set; irq found
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add \irqnr, \irqnr, #1
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bne 1001b @ Until no bits
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b 1009f @ Nothing? Hmm.
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1002: and \irqnr, \tmp, #0x3f @ Mask for valid bits
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1008: movs \irqstat, #1 @ Force !Z
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str \tmp, [\base, #0x0030] @ Clear vector
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b 1009f
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@ Implementation of the LH7A400 get_irqnr_and_base.
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1000: mov \irqnr, #0
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mov \base, #io_p2v(0x80000000) @ APB registers
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ldr \irqstat, [\base, #0x500] @ PIC INTSR
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1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry
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bcs 1008f @ Bit set; irq found
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add \irqnr, \irqnr, #1
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bne 1001b @ Until no bits
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b 1009f @ Nothing? Hmm.
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1008: movs \irqstat, #1 @ Force !Z
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1009:
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.endm
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#elif defined (CONFIG_ARCH_LH7A400)
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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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.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 \irqnr, #0
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mov \base, #io_p2v(0x80000000) @ APB registers
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ldr \irqstat, [\base, #0x500] @ PIC INTSR
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1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry
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bcs 1008f @ Bit set; irq found
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add \irqnr, \irqnr, #1
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bne 1001b @ Until no bits
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b 1009f @ Nothing? Hmm.
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1008: movs \irqstat, #1 @ Force !Z
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1009:
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.endm
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#elif defined(CONFIG_ARCH_LH7A404)
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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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.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 \irqnr, #0 @ VIC1 irq base
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mov \base, #io_p2v(0x80000000) @ APB registers
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add \base, \base, #0x8000
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ldr \tmp, [\base, #0x0030] @ VIC1_VECTADDR
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tst \tmp, #VA_VECTORED @ Direct vectored
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bne 1002f
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tst \tmp, #VA_VIC1DEFAULT @ Default vectored VIC1
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ldrne \irqstat, [\base, #0] @ VIC1_IRQSTATUS
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bne 1001f
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add \base, \base, #(0xa000 - 0x8000)
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ldr \tmp, [\base, #0x0030] @ VIC2_VECTADDR
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tst \tmp, #VA_VECTORED @ Direct vectored
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bne 1002f
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ldr \irqstat, [\base, #0] @ VIC2_IRQSTATUS
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mov \irqnr, #32 @ VIC2 irq base
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1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry
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bcs 1008f @ Bit set; irq found
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add \irqnr, \irqnr, #1
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bne 1001b @ Until no bits
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b 1009f @ Nothing? Hmm.
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1002: and \irqnr, \tmp, #0x3f @ Mask for valid bits
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1008: movs \irqstat, #1 @ Force !Z
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str \tmp, [\base, #0x0030] @ Clear vector
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1009:
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.endm
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#endif
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