arch/arm/mach-pxa/generic.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-pxa/generic.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-pxa/generic.c
Extension
.c
Size
2556 bytes
Lines
114
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  linux/arch/arm/mach-pxa/generic.c
 *
 *  Author:	Nicolas Pitre
 *  Created:	Jun 15, 2001
 *  Copyright:	MontaVista Software Inc.
 *
 * Code common to all PXA machines.
 *
 * Since this file should be linked before any other machine specific file,
 * the __initcall() here will be executed first.  This serves as default
 * initialization stuff for PXA machines which can be overridden later if
 * need be.
 */
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/soc/pxa/cpu.h>
#include <linux/soc/pxa/smemc.h>
#include <linux/clk/pxa.h>

#include <asm/mach/map.h>
#include <asm/mach-types.h>

#include "addr-map.h"
#include "irqs.h"
#include "reset.h"
#include "smemc.h"
#include "pxa3xx-regs.h"

#include "generic.h"
#include <clocksource/pxa.h>

void clear_reset_status(unsigned int mask)
{
	if (cpu_is_pxa2xx())
		pxa2xx_clear_reset_status(mask);
	else {
		/* RESET_STATUS_* has a 1:1 mapping with ARSR */
		ARSR = mask;
	}
}

/*
 * For non device-tree builds, keep legacy timer init
 */
void __init pxa_timer_init(void)
{
	if (cpu_is_pxa25x())
		pxa25x_clocks_init(io_p2v(0x41300000));
	if (cpu_is_pxa27x())
		pxa27x_clocks_init(io_p2v(0x41300000));
	if (cpu_is_pxa3xx())
		pxa3xx_clocks_init(io_p2v(0x41340000), io_p2v(0x41350000));
	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000));
}

void pxa_smemc_set_pcmcia_timing(int sock, u32 mcmem, u32 mcatt, u32 mcio)
{
	__raw_writel(mcmem, MCMEM(sock));
	__raw_writel(mcatt, MCATT(sock));
	__raw_writel(mcio, MCIO(sock));
}
EXPORT_SYMBOL_GPL(pxa_smemc_set_pcmcia_timing);

void pxa_smemc_set_pcmcia_socket(int nr)
{
	switch (nr) {
	case 0:
		__raw_writel(0, MECR);
		break;
	case 1:
		/*
		 * We have at least one socket, so set MECR:CIT
		 * (Card Is There)
		 */
		__raw_writel(MECR_CIT, MECR);
		break;
	case 2:
		/* Set CIT and MECR:NOS (Number Of Sockets) */
		__raw_writel(MECR_CIT | MECR_NOS, MECR);
		break;
	}
}
EXPORT_SYMBOL_GPL(pxa_smemc_set_pcmcia_socket);

void __iomem *pxa_smemc_get_mdrefr(void)
{

Annotation

Implementation Notes