diff options
| author | viresh kumar <viresh.kumar@st.com> | 2010-04-01 12:30:19 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-04-14 11:26:22 +0100 |
| commit | a7e9c45219b2d40a80fbd1b7337cbecab85be2bd (patch) | |
| tree | 88521a51ddfa7485254b4adcd50d8109c4e4e947 /arch/arm/mach-spear3xx/include/mach/entry-macro.S | |
| parent | 39710479303fd3affb3e204e9a7a75cc676977b5 (diff) | |
ARM: 6010/1: ST SPEAr: Added basic header files for SPEAr3xx machine family
Reviewed-by: Linus Walleij <linux.walleij@stericsson.com>
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-spear3xx/include/mach/entry-macro.S')
| -rw-r--r-- | arch/arm/mach-spear3xx/include/mach/entry-macro.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/mach-spear3xx/include/mach/entry-macro.S b/arch/arm/mach-spear3xx/include/mach/entry-macro.S new file mode 100644 index 00000000000..947625d6b48 --- /dev/null +++ b/arch/arm/mach-spear3xx/include/mach/entry-macro.S @@ -0,0 +1,46 @@ +/* + * arch/arm/mach-spear3xx/include/mach/entry-macro.S + * + * Low-level IRQ helper macros for SPEAr3xx machine family + * + * Copyright (C) 2009 ST Microelectronics + * Viresh Kumar<viresh.kumar@st.com> + * + * 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 <mach/hardware.h> +#include <mach/spear.h> +#include <asm/hardware/vic.h> + + .macro disable_fiq + .endm + + .macro get_irqnr_preamble, base, tmp + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + .endm + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + ldr \base, =VA_SPEAR3XX_ML1_VIC_BASE + ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get status + teq \irqstat, #0 + beq 1001f @ this will set/reset + @ zero register + /* + * Following code will find bit position of least significang + * bit set in irqstat, using following equation + * least significant bit set in n = (n & ~(n-1)) + */ + sub \tmp, \irqstat, #1 @ tmp = irqstat - 1 + mvn \tmp, \tmp @ tmp = ~tmp + and \irqstat, \irqstat, \tmp @ irqstat &= tmp + /* Now, irqstat is = bit no. of 1st bit set in vic irq status */ + clz \tmp, \irqstat @ tmp = leading zeros + rsb \irqnr, \tmp, #0x1F @ irqnr = 32 - tmp - 1 + +1001: /* EQ will be set if no irqs pending */ + .endm |