arch/sh/kernel/cpu/sh3/serial-sh7710.c

Source file repositories/reference/linux-study-clean/arch/sh/kernel/cpu/sh3/serial-sh7710.c

File Facts

System
Linux kernel
Corpus path
arch/sh/kernel/cpu/sh3/serial-sh7710.c
Extension
.c
Size
590 bytes
Lines
22
Domain
Architecture Layer
Bucket
arch/sh
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
#include <linux/serial_sci.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <cpu/serial.h>

#define PACR 0xa4050100
#define PBCR 0xa4050102

static void sh7710_sci_init_pins(struct uart_port *port, unsigned int cflag)
{
	if (port->mapbase == 0xA4400000) {
		__raw_writew(__raw_readw(PACR) & 0xffc0, PACR);
		__raw_writew(__raw_readw(PBCR) & 0x0fff, PBCR);
	} else if (port->mapbase == 0xA4410000)
		__raw_writew(__raw_readw(PBCR) & 0xf003, PBCR);
}

struct plat_sci_port_ops sh7710_sci_port_ops = {
	.init_pins	= sh7710_sci_init_pins,
};

Annotation

Implementation Notes