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![Simon Glass](/assets/img/avatar_default.png)
This function belongs in time.h so move it over and add a comment. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
183 lines
3.8 KiB
C
183 lines
3.8 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 <time.h>
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#include <asm/io.h>
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#include <u-boot/crc.h>
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DECLARE_GLOBAL_DATA_PTR;
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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: Actual size of iotrace buffer in bytes
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* @needed_size: Needed of iotrace buffer in bytes
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* @offset: Current write offset into iotrace buffer
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* @region_start: Address of IO region to trace
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* @region_size: Size of region to trace. if 0 will trace all address space
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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 needed_size;
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ulong offset;
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ulong region_start;
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ulong region_size;
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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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if (iotrace.region_size)
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if ((ulong)ptr < iotrace.region_start ||
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(ulong)ptr > iotrace.region_start + iotrace.region_size)
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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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} else {
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WARN_ONCE(1, "WARNING: iotrace buffer exhausted, please check needed length using \"iotrace stats\"\n");
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iotrace.needed_size += sizeof(struct iotrace_record);
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return;
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}
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rec->timestamp = timer_get_us();
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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.needed_size += sizeof(struct iotrace_record);
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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, 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, 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, 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_region(ulong start, ulong size)
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{
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iotrace.region_start = start;
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iotrace.region_size = size;
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}
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void iotrace_reset_region(void)
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{
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iotrace.region_start = 0;
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iotrace.region_size = 0;
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}
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void iotrace_get_region(ulong *start, ulong *size)
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{
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*start = iotrace.region_start;
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*size = iotrace.region_size;
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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 *needed_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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*needed_size = iotrace.needed_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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