arch/arm/mach-s3c/pl080.c
Source file repositories/reference/linux-study-clean/arch/arm/mach-s3c/pl080.c
File Facts
- System
- Linux kernel
- Corpus path
arch/arm/mach-s3c/pl080.c- Extension
.c- Size
- 6382 bytes
- Lines
- 265
- Domain
- Architecture Layer
- Bucket
- arch/arm
- 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.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/kernel.hlinux/amba/bus.hlinux/amba/pl080.hlinux/amba/pl08x.hlinux/of.hcpu.hirqs.hmap.hregs-sys-s3c64xx.h
Detected Declarations
function pl08x_get_xfer_signalfunction pl08x_put_xfer_signalfunction s3c64xx_pl080_init
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
//
// Samsung's S3C64XX generic DMA support using amba-pl08x driver.
//
// Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
#include <linux/kernel.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl080.h>
#include <linux/amba/pl08x.h>
#include <linux/of.h>
#include "cpu.h"
#include "irqs.h"
#include "map.h"
#include "regs-sys-s3c64xx.h"
static int pl08x_get_xfer_signal(const struct pl08x_channel_data *cd)
{
return cd->min_signal;
}
static void pl08x_put_xfer_signal(const struct pl08x_channel_data *cd, int ch)
{
}
/*
* DMA0
*/
static struct pl08x_channel_data s3c64xx_dma0_info[] = {
{
.bus_id = "uart0_tx",
.min_signal = 0,
.max_signal = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart0_rx",
.min_signal = 1,
.max_signal = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart1_tx",
.min_signal = 2,
.max_signal = 2,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart1_rx",
.min_signal = 3,
.max_signal = 3,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart2_tx",
.min_signal = 4,
.max_signal = 4,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart2_rx",
.min_signal = 5,
.max_signal = 5,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart3_tx",
.min_signal = 6,
.max_signal = 6,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart3_rx",
.min_signal = 7,
.max_signal = 7,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "pcm0_tx",
.min_signal = 8,
.max_signal = 8,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "pcm0_rx",
.min_signal = 9,
.max_signal = 9,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2s0_tx",
.min_signal = 10,
.max_signal = 10,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2s0_rx",
.min_signal = 11,
Annotation
- Immediate include surface: `linux/kernel.h`, `linux/amba/bus.h`, `linux/amba/pl080.h`, `linux/amba/pl08x.h`, `linux/of.h`, `cpu.h`, `irqs.h`, `map.h`.
- Detected declarations: `function pl08x_get_xfer_signal`, `function pl08x_put_xfer_signal`, `function s3c64xx_pl080_init`.
- Atlas domain: Architecture Layer / arch/arm.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.