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96 lines
2.1 KiB
96 lines
2.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/arch/arm/mach-integrator/core.c |
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* |
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* Copyright (C) 2000-2003 Deep Blue Solutions Ltd |
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*/ |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/device.h> |
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#include <linux/export.h> |
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#include <linux/spinlock.h> |
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#include <linux/interrupt.h> |
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#include <linux/irq.h> |
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#include <linux/memblock.h> |
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#include <linux/sched.h> |
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#include <linux/smp.h> |
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#include <linux/amba/bus.h> |
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#include <linux/amba/serial.h> |
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#include <linux/io.h> |
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#include <linux/stat.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/pgtable.h> |
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#include <asm/mach-types.h> |
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#include <asm/mach/time.h> |
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#include "hardware.h" |
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#include "cm.h" |
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#include "common.h" |
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static DEFINE_RAW_SPINLOCK(cm_lock); |
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static void __iomem *cm_base; |
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/** |
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* cm_get - get the value from the CM_CTRL register |
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*/ |
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u32 cm_get(void) |
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{ |
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return readl(cm_base + INTEGRATOR_HDR_CTRL_OFFSET); |
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} |
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/** |
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* cm_control - update the CM_CTRL register. |
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* @mask: bits to change |
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* @set: bits to set |
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*/ |
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void cm_control(u32 mask, u32 set) |
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{ |
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unsigned long flags; |
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u32 val; |
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raw_spin_lock_irqsave(&cm_lock, flags); |
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val = readl(cm_base + INTEGRATOR_HDR_CTRL_OFFSET) & ~mask; |
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writel(val | set, cm_base + INTEGRATOR_HDR_CTRL_OFFSET); |
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raw_spin_unlock_irqrestore(&cm_lock, flags); |
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} |
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void cm_clear_irqs(void) |
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{ |
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/* disable core module IRQs */ |
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writel(0xffffffffU, cm_base + INTEGRATOR_HDR_IC_OFFSET + |
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IRQ_ENABLE_CLEAR); |
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} |
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static const struct of_device_id cm_match[] = { |
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{ .compatible = "arm,core-module-integrator"}, |
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{ }, |
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}; |
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void cm_init(void) |
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{ |
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struct device_node *cm = of_find_matching_node(NULL, cm_match); |
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if (!cm) { |
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pr_crit("no core module node found in device tree\n"); |
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return; |
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} |
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cm_base = of_iomap(cm, 0); |
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if (!cm_base) { |
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pr_crit("could not remap core module\n"); |
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return; |
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} |
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cm_clear_irqs(); |
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} |
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/* |
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* We need to stop things allocating the low memory; ideally we need a |
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* better implementation of GFP_DMA which does not assume that DMA-able |
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* memory starts at zero. |
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*/ |
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void __init integrator_reserve(void) |
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{ |
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memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET); |
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}
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