diff options
Diffstat (limited to 'include/asm-arm/arch-lh7a40x/entry-macro.S')
| -rw-r--r-- | include/asm-arm/arch-lh7a40x/entry-macro.S | 70 |
1 files changed, 66 insertions, 4 deletions
diff --git a/include/asm-arm/arch-lh7a40x/entry-macro.S b/include/asm-arm/arch-lh7a40x/entry-macro.S index a2f67c06d9c9..9fc7f4988124 100644 --- a/include/asm-arm/arch-lh7a40x/entry-macro.S +++ b/include/asm-arm/arch-lh7a40x/entry-macro.S @@ -10,11 +10,73 @@ #include <asm/hardware.h> #include <asm/arch/irqs.h> -# if defined (CONFIG_ARCH_LH7A400) && defined (CONFIG_ARCH_LH7A404) -# error "LH7A400 and LH7A404 are mutually exclusive" -# endif +/* In order to allow there to be support for both of the processor + classes at the same time, we make a hack here that isn't very + pretty. At startup, the link pointed to with the + branch_irq_lh7a400 symbol is replaced with a NOP when the CPU is + detected as a lh7a404. -# if defined (CONFIG_ARCH_LH7A400) + *** FIXME: we should clean this up so that there is only one + implementation for each CPU's design. + +*/ + +#if defined (CONFIG_ARCH_LH7A400) && defined (CONFIG_ARCH_LH7A404) + + .macro disable_fiq + .endm + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + +branch_irq_lh7a400: b 1000f + +@ Implementation of the LH7A404 get_irqnr_and_base. + + mov \irqnr, #0 @ VIC1 irq base + mov \base, #io_p2v(0x80000000) @ APB registers + add \base, \base, #0x8000 + ldr \tmp, [\base, #0x0030] @ VIC1_VECTADDR + tst \tmp, #VA_VECTORED @ Direct vectored + bne 1002f + tst \tmp, #VA_VIC1DEFAULT @ Default vectored VIC1 + ldrne \irqstat, [\base, #0] @ VIC1_IRQSTATUS + bne 1001f + add \base, \base, #(0xa000 - 0x8000) + ldr \tmp, [\base, #0x0030] @ VIC2_VECTADDR + tst \tmp, #VA_VECTORED @ Direct vectored + bne 1002f + ldr \irqstat, [\base, #0] @ VIC2_IRQSTATUS + mov \irqnr, #32 @ VIC2 irq base + +1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry + bcs 1008f @ Bit set; irq found + add \irqnr, \irqnr, #1 + bne 1001b @ Until no bits + b 1009f @ Nothing? Hmm. +1002: and \irqnr, \tmp, #0x3f @ Mask for valid bits +1008: movs \irqstat, #1 @ Force !Z + str \tmp, [\base, #0x0030] @ Clear vector + b 1009f + +@ Implementation of the LH7A400 get_irqnr_and_base. + +1000: mov \irqnr, #0 + mov \base, #io_p2v(0x80000000) @ APB registers + ldr \irqstat, [\base, #0x500] @ PIC INTSR + +1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry + bcs 1008f @ Bit set; irq found + add \irqnr, \irqnr, #1 + bne 1001b @ Until no bits + b 1009f @ Nothing? Hmm. +1008: movs \irqstat, #1 @ Force !Z + +1009: + .endm + + + +#elif defined (CONFIG_ARCH_LH7A400) .macro disable_fiq .endm |