mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
170 lines
3.2 KiB
C
170 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2014 Google, Inc.
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*/
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#define IOTRACE_IMPL
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#include <common.h>
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#include <mapmem.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* Support up to the machine word length for now */
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typedef ulong iovalue_t;
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enum iotrace_flags {
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IOT_8 = 0,
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IOT_16,
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IOT_32,
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IOT_READ = 0 << 3,
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IOT_WRITE = 1 << 3,
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};
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/**
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* struct iotrace_record - Holds a single I/O trace record
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*
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* @flags: I/O access type
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* @addr: Address of access
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* @value: Value written or read
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*/
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struct iotrace_record {
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enum iotrace_flags flags;
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phys_addr_t addr;
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iovalue_t value;
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};
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/**
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* struct iotrace - current trace status and checksum
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*
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* @start: Start address of iotrace buffer
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* @size: Size of iotrace buffer in bytes
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* @offset: Current write offset into iotrace buffer
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* @crc32: Current value of CRC chceksum of trace records
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* @enabled: true if enabled, false if disabled
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*/
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static struct iotrace {
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ulong start;
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ulong size;
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ulong offset;
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u32 crc32;
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bool enabled;
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} iotrace;
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static void add_record(int flags, const void *ptr, ulong value)
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{
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struct iotrace_record srec, *rec = &srec;
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/*
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* We don't support iotrace before relocation. Since the trace buffer
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* is set up by a command, it can't be enabled at present. To change
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* this we would need to set the iotrace buffer at build-time. See
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* lib/trace.c for how this might be done if you are interested.
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*/
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if (!(gd->flags & GD_FLG_RELOC) || !iotrace.enabled)
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return;
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/* Store it if there is room */
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if (iotrace.offset + sizeof(*rec) < iotrace.size) {
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rec = (struct iotrace_record *)map_sysmem(
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iotrace.start + iotrace.offset,
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sizeof(value));
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}
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rec->flags = flags;
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rec->addr = map_to_sysmem(ptr);
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rec->value = value;
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/* Update our checksum */
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iotrace.crc32 = crc32(iotrace.crc32, (unsigned char *)rec,
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sizeof(*rec));
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iotrace.offset += sizeof(struct iotrace_record);
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}
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u32 iotrace_readl(const void *ptr)
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{
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u32 v;
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v = readl(ptr);
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add_record(IOT_32 | IOT_READ, ptr, v);
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return v;
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}
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void iotrace_writel(ulong value, const void *ptr)
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{
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add_record(IOT_32 | IOT_WRITE, ptr, value);
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writel(value, ptr);
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}
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u16 iotrace_readw(const void *ptr)
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{
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u32 v;
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v = readw(ptr);
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add_record(IOT_16 | IOT_READ, ptr, v);
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return v;
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}
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void iotrace_writew(ulong value, const void *ptr)
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{
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add_record(IOT_16 | IOT_WRITE, ptr, value);
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writew(value, ptr);
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}
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u8 iotrace_readb(const void *ptr)
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{
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u32 v;
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v = readb(ptr);
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add_record(IOT_8 | IOT_READ, ptr, v);
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return v;
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}
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void iotrace_writeb(ulong value, const void *ptr)
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{
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add_record(IOT_8 | IOT_WRITE, ptr, value);
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writeb(value, ptr);
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}
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void iotrace_reset_checksum(void)
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{
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iotrace.crc32 = 0;
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}
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u32 iotrace_get_checksum(void)
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{
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return iotrace.crc32;
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}
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void iotrace_set_enabled(int enable)
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{
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iotrace.enabled = enable;
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}
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int iotrace_get_enabled(void)
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{
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return iotrace.enabled;
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}
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void iotrace_set_buffer(ulong start, ulong size)
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{
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iotrace.start = start;
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iotrace.size = size;
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iotrace.offset = 0;
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iotrace.crc32 = 0;
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}
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void iotrace_get_buffer(ulong *start, ulong *size, ulong *offset, ulong *count)
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{
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*start = iotrace.start;
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*size = iotrace.size;
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*offset = iotrace.offset;
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*count = iotrace.offset / sizeof(struct iotrace_record);
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}
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