diff options
Diffstat (limited to 'arch/arm/include/asm/entry-macro-vic2.S')
| -rw-r--r-- | arch/arm/include/asm/entry-macro-vic2.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/arm/include/asm/entry-macro-vic2.S b/arch/arm/include/asm/entry-macro-vic2.S new file mode 100644 index 000000000000..3ceb85e43850 --- /dev/null +++ b/arch/arm/include/asm/entry-macro-vic2.S | |||
| @@ -0,0 +1,57 @@ | |||
| 1 | /* arch/arm/include/asm/entry-macro-vic2.S | ||
| 2 | * | ||
| 3 | * Originally arch/arm/mach-s3c6400/include/mach/entry-macro.S | ||
| 4 | * | ||
| 5 | * Copyright 2008 Openmoko, Inc. | ||
| 6 | * Copyright 2008 Simtec Electronics | ||
| 7 | * http://armlinux.simtec.co.uk/ | ||
| 8 | * Ben Dooks <ben@simtec.co.uk> | ||
| 9 | * | ||
| 10 | * Low-level IRQ helper macros for a device with two VICs | ||
| 11 | * | ||
| 12 | * This file is licensed under the terms of the GNU General Public | ||
| 13 | * License version 2. This program is licensed "as is" without any | ||
| 14 | * warranty of any kind, whether express or implied. | ||
| 15 | */ | ||
| 16 | |||
| 17 | /* This should be included from <mach/entry-macro.S> with the necessary | ||
| 18 | * defines for virtual addresses and IRQ bases for the two vics. | ||
| 19 | * | ||
| 20 | * The code needs the following defined: | ||
| 21 | * IRQ_VIC0_BASE IRQ number of VIC0's first IRQ | ||
| 22 | * IRQ_VIC1_BASE IRQ number of VIC1's first IRQ | ||
| 23 | * VA_VIC0 Virtual address of VIC0 | ||
| 24 | * VA_VIC1 Virtual address of VIC1 | ||
| 25 | * | ||
| 26 | * Note, code assumes VIC0's virtual address is an ARM immediate constant | ||
| 27 | * away from VIC1. | ||
| 28 | */ | ||
| 29 | |||
| 30 | #include <asm/hardware/vic.h> | ||
| 31 | |||
| 32 | .macro disable_fiq | ||
| 33 | .endm | ||
| 34 | |||
| 35 | .macro get_irqnr_preamble, base, tmp | ||
| 36 | ldr \base, =VA_VIC0 | ||
| 37 | .endm | ||
| 38 | |||
| 39 | .macro arch_ret_to_user, tmp1, tmp2 | ||
| 40 | .endm | ||
| 41 | |||
| 42 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp | ||
| 43 | |||
| 44 | @ check the vic0 | ||
| 45 | mov \irqnr, #IRQ_VIC0_BASE + 31 | ||
| 46 | ldr \irqstat, [ \base, # VIC_IRQ_STATUS ] | ||
| 47 | teq \irqstat, #0 | ||
| 48 | |||
| 49 | @ otherwise try vic1 | ||
| 50 | addeq \tmp, \base, #(VA_VIC1 - VA_VIC0) | ||
| 51 | addeq \irqnr, \irqnr, #(IRQ_VIC1_BASE - IRQ_VIC0_BASE) | ||
| 52 | ldreq \irqstat, [ \tmp, # VIC_IRQ_STATUS ] | ||
| 53 | teqeq \irqstat, #0 | ||
| 54 | |||
| 55 | clzne \irqstat, \irqstat | ||
| 56 | subne \irqnr, \irqnr, \irqstat | ||
| 57 | .endm | ||