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-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIVAwUAT3NKzROxKuMESys7AQKElw/+JyDxJSlj+g+nymkx8IVVuU8CsEwNLgRk 8KEnRfLhGtkXFLSJYWO6jzGo16F8Uqli1PdMFte/wagSv0285/HZaKlkkBVHdJ/m u40oSjgT013bBh6MQ0Oaf8pFezFUiQB5zPOA9QGaLVGDLXCmgqUgd7exaD5wRIwB ZmyItjZeAVnDfk1R+ZiNYytHAi8A5wSB+eFDCIQYgyulA1Igd1UnRtx+dRKbvc/m rWQ6KWbZHIdvP1ksd8wHHkrlUD2pEeJ8glJLsZUhMm/5oMf/8RmOCvmo8rvE/qwl eDQ1h4cGYlfjobxXZMHqAN9m7Jg2bI946HZjdb7/7oCeO6VW3FwPZ/Ic75p+wp45 HXJTItufERYk6QxShiOKvA+QexnYwY0IT5oRP4DrhdVB/X9cl2MoaZHC+RbYLQy+ /5VNZKi38iK4F9AbFamS7kd0i5QszA/ZzEzKZ6VMuOp3W/fagpn4ZJT1LIA3m4A9 Q0cj24mqeyCfjysu0TMbPtaN+Yjeu1o1OFRvM8XffbZsp5bNzuTDEvviJ2NXw4vK 4qUHulhYSEWcu9YgAZXvEWDEM78FXCkg2v/CrZXH5tyc95kUkMPcgG+QZBB5wElR FaOKpiC/BuNIGEf02IZQ4nfDxE90QwnDeoYeV+FvNj9UEOopJ5z5bMPoTHxm4cCD NypQthI85pc= =G9mT -----END PGP SIGNATURE----- Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system Pull "Disintegrate and delete asm/system.h" from David Howells: "Here are a bunch of patches to disintegrate asm/system.h into a set of separate bits to relieve the problem of circular inclusion dependencies. I've built all the working defconfigs from all the arches that I can and made sure that they don't break. The reason for these patches is that I recently encountered a circular dependency problem that came about when I produced some patches to optimise get_order() by rewriting it to use ilog2(). This uses bitops - and on the SH arch asm/bitops.h drags in asm-generic/get_order.h by a circuituous route involving asm/system.h. The main difficulty seems to be asm/system.h. It holds a number of low level bits with no/few dependencies that are commonly used (eg. memory barriers) and a number of bits with more dependencies that aren't used in many places (eg. switch_to()). These patches break asm/system.h up into the following core pieces: (1) asm/barrier.h Move memory barriers here. This already done for MIPS and Alpha. (2) asm/switch_to.h Move switch_to() and related stuff here. (3) asm/exec.h Move arch_align_stack() here. Other process execution related bits could perhaps go here from asm/processor.h. (4) asm/cmpxchg.h Move xchg() and cmpxchg() here as they're full word atomic ops and frequently used by atomic_xchg() and atomic_cmpxchg(). (5) asm/bug.h Move die() and related bits. (6) asm/auxvec.h Move AT_VECTOR_SIZE_ARCH here. Other arch headers are created as needed on a per-arch basis." Fixed up some conflicts from other header file cleanups and moving code around that has happened in the meantime, so David's testing is somewhat weakened by that. We'll find out anything that got broken and fix it.. * tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits) Delete all instances of asm/system.h Remove all #inclusions of asm/system.h Add #includes needed to permit the removal of asm/system.h Move all declarations of free_initmem() to linux/mm.h Disintegrate asm/system.h for OpenRISC Split arch_align_stack() out from asm-generic/system.h Split the switch_to() wrapper out of asm-generic/system.h Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h Create asm-generic/barrier.h Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h Disintegrate asm/system.h for Xtensa Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt] Disintegrate asm/system.h for Tile Disintegrate asm/system.h for Sparc Disintegrate asm/system.h for SH Disintegrate asm/system.h for Score Disintegrate asm/system.h for S390 Disintegrate asm/system.h for PowerPC Disintegrate asm/system.h for PA-RISC Disintegrate asm/system.h for MN10300 ...
245 lines
5.3 KiB
C
245 lines
5.3 KiB
C
/*
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* linux/arch/arm/mach-clps711x/core.c
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*
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* Core support for the CLPS711x-based machines.
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*
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* Copyright (C) 2001,2011 Deep Blue Solutions Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/sched.h>
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#include <linux/timex.h>
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#include <asm/sizes.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/leds.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <asm/mach/map.h>
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#include <asm/mach/time.h>
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#include <asm/hardware/clps7111.h>
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#include <asm/system_misc.h>
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/*
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* This maps the generic CLPS711x registers
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*/
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static struct map_desc clps711x_io_desc[] __initdata = {
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{
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.virtual = CLPS7111_VIRT_BASE,
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.pfn = __phys_to_pfn(CLPS7111_PHYS_BASE),
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.length = SZ_1M,
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.type = MT_DEVICE
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}
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};
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void __init clps711x_map_io(void)
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{
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iotable_init(clps711x_io_desc, ARRAY_SIZE(clps711x_io_desc));
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}
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static void int1_mask(struct irq_data *d)
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{
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u32 intmr1;
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intmr1 = clps_readl(INTMR1);
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intmr1 &= ~(1 << d->irq);
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clps_writel(intmr1, INTMR1);
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}
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static void int1_ack(struct irq_data *d)
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{
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u32 intmr1;
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intmr1 = clps_readl(INTMR1);
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intmr1 &= ~(1 << d->irq);
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clps_writel(intmr1, INTMR1);
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switch (d->irq) {
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case IRQ_CSINT: clps_writel(0, COEOI); break;
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case IRQ_TC1OI: clps_writel(0, TC1EOI); break;
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case IRQ_TC2OI: clps_writel(0, TC2EOI); break;
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case IRQ_RTCMI: clps_writel(0, RTCEOI); break;
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case IRQ_TINT: clps_writel(0, TEOI); break;
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case IRQ_UMSINT: clps_writel(0, UMSEOI); break;
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}
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}
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static void int1_unmask(struct irq_data *d)
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{
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u32 intmr1;
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intmr1 = clps_readl(INTMR1);
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intmr1 |= 1 << d->irq;
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clps_writel(intmr1, INTMR1);
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}
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static struct irq_chip int1_chip = {
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.irq_ack = int1_ack,
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.irq_mask = int1_mask,
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.irq_unmask = int1_unmask,
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};
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static void int2_mask(struct irq_data *d)
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{
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u32 intmr2;
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intmr2 = clps_readl(INTMR2);
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intmr2 &= ~(1 << (d->irq - 16));
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clps_writel(intmr2, INTMR2);
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}
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static void int2_ack(struct irq_data *d)
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{
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u32 intmr2;
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intmr2 = clps_readl(INTMR2);
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intmr2 &= ~(1 << (d->irq - 16));
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clps_writel(intmr2, INTMR2);
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switch (d->irq) {
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case IRQ_KBDINT: clps_writel(0, KBDEOI); break;
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}
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}
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static void int2_unmask(struct irq_data *d)
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{
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u32 intmr2;
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intmr2 = clps_readl(INTMR2);
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intmr2 |= 1 << (d->irq - 16);
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clps_writel(intmr2, INTMR2);
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}
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static struct irq_chip int2_chip = {
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.irq_ack = int2_ack,
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.irq_mask = int2_mask,
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.irq_unmask = int2_unmask,
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};
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void __init clps711x_init_irq(void)
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{
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unsigned int i;
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for (i = 0; i < NR_IRQS; i++) {
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if (INT1_IRQS & (1 << i)) {
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irq_set_chip_and_handler(i, &int1_chip,
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handle_level_irq);
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set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
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}
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if (INT2_IRQS & (1 << i)) {
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irq_set_chip_and_handler(i, &int2_chip,
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handle_level_irq);
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set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
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}
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}
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/*
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* Disable interrupts
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*/
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clps_writel(0, INTMR1);
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clps_writel(0, INTMR2);
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/*
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* Clear down any pending interrupts
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*/
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clps_writel(0, COEOI);
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clps_writel(0, TC1EOI);
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clps_writel(0, TC2EOI);
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clps_writel(0, RTCEOI);
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clps_writel(0, TEOI);
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clps_writel(0, UMSEOI);
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clps_writel(0, SYNCIO);
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clps_writel(0, KBDEOI);
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}
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/*
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* gettimeoffset() returns time since last timer tick, in usecs.
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*
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* 'LATCH' is hwclock ticks (see CLOCK_TICK_RATE in timex.h) per jiffy.
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* 'tick' is usecs per jiffy.
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*/
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static unsigned long clps711x_gettimeoffset(void)
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{
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unsigned long hwticks;
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hwticks = LATCH - (clps_readl(TC2D) & 0xffff); /* since last underflow */
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return (hwticks * (tick_nsec / 1000)) / LATCH;
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}
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/*
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* IRQ handler for the timer
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*/
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static irqreturn_t p720t_timer_interrupt(int irq, void *dev_id)
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{
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timer_tick();
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return IRQ_HANDLED;
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}
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static struct irqaction clps711x_timer_irq = {
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.name = "CLPS711x Timer Tick",
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.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
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.handler = p720t_timer_interrupt,
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};
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static void __init clps711x_timer_init(void)
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{
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struct timespec tv;
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unsigned int syscon;
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syscon = clps_readl(SYSCON1);
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syscon |= SYSCON1_TC2S | SYSCON1_TC2M;
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clps_writel(syscon, SYSCON1);
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clps_writel(LATCH-1, TC2D); /* 512kHz / 100Hz - 1 */
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setup_irq(IRQ_TC2OI, &clps711x_timer_irq);
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tv.tv_nsec = 0;
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tv.tv_sec = clps_readl(RTCDR);
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do_settimeofday(&tv);
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}
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struct sys_timer clps711x_timer = {
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.init = clps711x_timer_init,
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.offset = clps711x_gettimeoffset,
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};
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void clps711x_restart(char mode, const char *cmd)
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{
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soft_restart(0);
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}
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static void clps711x_idle(void)
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{
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clps_writel(1, HALT);
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__asm__ __volatile__(
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"mov r0, r0\n\
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mov r0, r0");
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}
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static int __init clps711x_idle_init(void)
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{
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arm_pm_idle = clps711x_idle;
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return 0;
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}
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arch_initcall(clps711x_idle_init);
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