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author | Magnus Damm <damm@opensource.se> | 2010-11-17 10:59:31 +0000 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2010-11-18 15:45:21 +0900 |
commit | 6d9598e24d50a8c72f48a3864327484a30aaee44 (patch) | |
tree | 4ff6d28a73306df0fe4853833010ca58a8ab8450 /arch/arm/mach-shmobile/include/mach/entry-macro.S | |
parent | 6d72ad35f1bfaf6e52ca7133cb51ce0e36f17528 (diff) | |
download | op-kernel-dev-6d9598e24d50a8c72f48a3864327484a30aaee44.zip op-kernel-dev-6d9598e24d50a8c72f48a3864327484a30aaee44.tar.gz |
ARM: mach-shmobile: Initial AG5 and AG5EVM support
This patch adds initial support for Renesas SH-Mobile AG5.
At this point the AG5 CPU support is limited to the ARM
core, SCIF serial and a CMT timer together with L2 cache
and the GIC. The AG5EVM board also supports Ethernet.
Future patches will add support for GPIO, INTCS, CPGA
and platform data / driver updates for devices such as
IIC, LCDC, FSI, KEYSC, CEU and SDHI among others.
The code in entry-macro.S will be cleaned up when the
ARM IRQ demux code improvements have been merged.
Depends on the AG5EVM mach-type recently registered but
not yet present in arch/arm/tools/mach-types.
As the AG5EVM board comes with 512MiB memory it is
recommended to turn on HIGHMEM.
Many thanks to Yoshii-san for initial bring up.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm/mach-shmobile/include/mach/entry-macro.S')
-rw-r--r-- | arch/arm/mach-shmobile/include/mach/entry-macro.S | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/include/mach/entry-macro.S b/arch/arm/mach-shmobile/include/mach/entry-macro.S index a285d13..c0c2643 100644 --- a/arch/arm/mach-shmobile/include/mach/entry-macro.S +++ b/arch/arm/mach-shmobile/include/mach/entry-macro.S @@ -20,6 +20,7 @@ .macro disable_fiq .endm +#if !defined(CONFIG_ARCH_SH73A0) .macro get_irqnr_preamble, base, tmp ldr \base, =INTFLGA .endm @@ -37,3 +38,80 @@ 1000: .endm +#else +/* + * arch/arm/mach-realview/include/mach/entry-macro.S + * + * Low-level IRQ helper macros for RealView 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/gic.h> + + .macro get_irqnr_preamble, base, tmp + ldr \base, =(0xf0000100) + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + .endm + +/* + * The interrupt numbering scheme is defined in the + * interrupt controller spec. To wit: + * + * Interrupts 0-15 are IPI + * 16-28 are reserved + * 29-31 are local. We allow 30 to be used for the watchdog. + * 32-1020 are global + * 1021-1022 are reserved + * 1023 is "spurious" (no interrupt) + * + * For now, we ignore all local interrupts so only return an interrupt if it's + * between 30 and 1020. The test_for_ipi routine below will pick up on IPIs. + * + * A simple read from the controller will tell us the number of the highest + * priority enabled interrupt. We then just need to check whether it is in the + * valid range for an IRQ (30-1020 inclusive). + */ + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + + ldr \irqstat, [\base, #GIC_CPU_INTACK] + /* bits 12-10 = src CPU, 9-0 = int # */ + + ldr \tmp, =1021 + bic \irqnr, \irqstat, #0x1c00 + cmp \irqnr, #29 + cmpcc \irqnr, \irqnr + cmpne \irqnr, \tmp + cmpcs \irqnr, \irqnr + + .endm + + /* We assume that irqstat (the raw value of the IRQ acknowledge + * register) is preserved from the macro above. + * If there is an IPI, we immediately signal end of interrupt on the + * controller, since this requires the original irqstat value which + * we won't easily be able to recreate later. + */ + + .macro test_for_ipi, irqnr, irqstat, base, tmp + bic \irqnr, \irqstat, #0x1c00 + cmp \irqnr, #16 + strcc \irqstat, [\base, #GIC_CPU_EOI] + cmpcs \irqnr, \irqnr + .endm + + /* As above, this assumes that irqstat and base are preserved.. */ + + .macro test_for_ltirq, irqnr, irqstat, base, tmp + bic \irqnr, \irqstat, #0x1c00 + mov \tmp, #0 + cmp \irqnr, #29 + moveq \tmp, #1 + streq \irqstat, [\base, #GIC_CPU_EOI] + cmp \tmp, #0 + .endm +#endif |