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21f47fbc5b
This adds support for the family of Systems-on-Chip produced initially by VIA and now its subsidiary WonderMedia that have recently become widespread in lower-end Chinese ARM-based tablets and netbooks. Support is included for both VT8500 and WM8505, selectable by a configuration switch at kernel build time. Included are basic machine initialization files, register and interrupt definitions, support for the on-chip interrupt controller, high-precision OS timer, GPIO lines, necessary macros for early debug, pulse-width-modulated outputs control, as well as platform device configurations for the specific drivers implemented elsewhere. Signed-off-by: Alexey Charkov <alchark@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
32 lines
761 B
ArmAsm
32 lines
761 B
ArmAsm
/*
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* arch/arm/mach-vt8500/include/mach/entry-macro.S
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*
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* Low-level IRQ helper macros for VIA VT8500
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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.macro disable_fiq
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.endm
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.macro get_irqnr_preamble, base, tmp
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@ physical 0xd8140000 is virtual 0xf8140000
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mov \base, #0xf8000000
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orr \base, \base, #0x00140000
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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ldr \irqnr, [\base]
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cmp \irqnr, #63 @ may be false positive, check interrupt status
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bne 1001f
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ldr \irqstat, [\base, #0x84]
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ands \irqstat, #0x80000000
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moveq \irqnr, #0
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1001:
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.endm
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