arch/powerpc/platforms/86xx/gef_sbc310.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/86xx/gef_sbc310.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/86xx/gef_sbc310.c
Extension
.c
Size
4086 bytes
Lines
180
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source 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-or-later
/*
 * GE SBC310 board support
 *
 * Author: Martyn Welch <martyn.welch@ge.com>
 *
 * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
 *
 * Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines)
 * Copyright 2006 Freescale Semiconductor Inc.
 *
 * NEC fixup adapted from arch/mips/pci/fixup-lm2e.c
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of.h>
#include <linux/of_address.h>

#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>

#include <asm/mpic.h>
#include <asm/nvram.h>

#include <sysdev/fsl_pci.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/ge/ge_pic.h>

#include "mpc86xx.h"

#undef DEBUG

#ifdef DEBUG
#define DBG (fmt...) do { printk(KERN_ERR "SBC310: " fmt); } while (0)
#else
#define DBG (fmt...) do { } while (0)
#endif

void __iomem *sbc310_regs;

static void __init gef_sbc310_init_irq(void)
{
	struct device_node *cascade_node = NULL;

	mpc86xx_init_irq();

	/*
	 * There is a simple interrupt handler in the main FPGA, this needs
	 * to be cascaded into the MPIC
	 */
	cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic");
	if (!cascade_node) {
		printk(KERN_WARNING "SBC310: No FPGA PIC\n");
		return;
	}

	gef_pic_init(cascade_node);
	of_node_put(cascade_node);
}

static void __init gef_sbc310_setup_arch(void)
{
	struct device_node *regs;
	printk(KERN_INFO "GE Intelligent Platforms SBC310 6U VPX SBC\n");

#ifdef CONFIG_SMP
	mpc86xx_smp_init();
#endif

	fsl_pci_assign_primary();

	/* Remap basic board registers */
	regs = of_find_compatible_node(NULL, NULL, "gef,fpga-regs");
	if (regs) {
		sbc310_regs = of_iomap(regs, 0);
		if (sbc310_regs == NULL)
			printk(KERN_WARNING "Unable to map board registers\n");
		of_node_put(regs);
	}

#if defined(CONFIG_MMIO_NVRAM)
	mmio_nvram_init();

Annotation

Implementation Notes