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authorMagnus Damm <damm@opensource.se>2010-12-22 07:17:09 -0500
committerPaul Mundt <lethal@linux-sh.org>2011-01-06 20:40:01 -0500
commit3dff8804fc087d55c593dda0ff78f475088ec57d (patch)
tree793630a80f6ebe8518529cedd210749f808d93d8 /arch/arm/mach-shmobile
parenteb6908a279dfbe2e1c1714c185e0f523a9749607 (diff)
ARM: mach-shmobile: Use shared GIC entry macros
Use the GIC demux code in asm/hardware/entry-macro-gic.S on the R-Mobile / SH-Mobile processors. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm/mach-shmobile')
-rw-r--r--arch/arm/mach-shmobile/include/mach/entry-macro-gic.S62
1 files changed, 1 insertions, 61 deletions
diff --git a/arch/arm/mach-shmobile/include/mach/entry-macro-gic.S b/arch/arm/mach-shmobile/include/mach/entry-macro-gic.S
index 50b1f16d54a2..48872dd15269 100644
--- a/arch/arm/mach-shmobile/include/mach/entry-macro-gic.S
+++ b/arch/arm/mach-shmobile/include/mach/entry-macro-gic.S
@@ -16,6 +16,7 @@
16 */ 16 */
17#include <mach/hardware.h> 17#include <mach/hardware.h>
18#include <asm/hardware/gic.h> 18#include <asm/hardware/gic.h>
19#include <asm/hardware/entry-macro-gic.S>
19 20
20 .macro disable_fiq 21 .macro disable_fiq
21 .endm 22 .endm
@@ -26,64 +27,3 @@
26 27
27 .macro arch_ret_to_user, tmp1, tmp2 28 .macro arch_ret_to_user, tmp1, tmp2
28 .endm 29 .endm
29
30 /*
31 * The interrupt numbering scheme is defined in the
32 * interrupt controller spec. To wit:
33 *
34 * Interrupts 0-15 are IPI
35 * 16-28 are reserved
36 * 29-31 are local. We allow 30 to be used for the watchdog.
37 * 32-1020 are global
38 * 1021-1022 are reserved
39 * 1023 is "spurious" (no interrupt)
40 *
41 * For now, we ignore all local interrupts so only return an
42 * interrupt if it's between 30 and 1020. The test_for_ipi
43 * routine below will pick up on IPIs.
44 *
45 * A simple read from the controller will tell us the number of
46 * the highest priority enabled interrupt. We then just need to
47 * check whether it is in the valid range for an IRQ (30-1020
48 * inclusive).
49 */
50
51 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
52
53 ldr \irqstat, [\base, #GIC_CPU_INTACK]
54 /* bits 12-10 = src CPU, 9-0 = int # */
55
56 ldr \tmp, =1021
57 bic \irqnr, \irqstat, #0x1c00
58 cmp \irqnr, #29
59 cmpcc \irqnr, \irqnr
60 cmpne \irqnr, \tmp
61 cmpcs \irqnr, \irqnr
62
63 .endm
64
65 /*
66 * We assume that irqstat (the raw value of the IRQ acknowledge
67 * register) is preserved from the macro above.
68 * If there is an IPI, we immediately signal end of interrupt on the
69 * controller, since this requires the original irqstat value which
70 * we won't easily be able to recreate later.
71 */
72
73 .macro test_for_ipi, irqnr, irqstat, base, tmp
74 bic \irqnr, \irqstat, #0x1c00
75 cmp \irqnr, #16
76 strcc \irqstat, [\base, #GIC_CPU_EOI]
77 cmpcs \irqnr, \irqnr
78 .endm
79
80 /* As above, this assumes that irqstat and base are preserved.. */
81
82 .macro test_for_ltirq, irqnr, irqstat, base, tmp
83 bic \irqnr, \irqstat, #0x1c00
84 mov \tmp, #0
85 cmp \irqnr, #29
86 moveq \tmp, #1
87 streq \irqstat, [\base, #GIC_CPU_EOI]
88 cmp \tmp, #0
89 .endm