0eb25b6196
In the case where the arch defines a custom map_sysmem(), make sure that including just mapmem.h is sufficient to have these functions as they are when the arch does not override it. Also split the non-arch specific functions out of common.h Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Simon Glass <sjg@chromium.org>
171 lines
3.2 KiB
C
171 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2014 Google, Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#define IOTRACE_IMPL
|
|
|
|
#include <common.h>
|
|
#include <mapmem.h>
|
|
#include <asm/io.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* Support up to the machine word length for now */
|
|
typedef ulong iovalue_t;
|
|
|
|
enum iotrace_flags {
|
|
IOT_8 = 0,
|
|
IOT_16,
|
|
IOT_32,
|
|
|
|
IOT_READ = 0 << 3,
|
|
IOT_WRITE = 1 << 3,
|
|
};
|
|
|
|
/**
|
|
* struct iotrace_record - Holds a single I/O trace record
|
|
*
|
|
* @flags: I/O access type
|
|
* @addr: Address of access
|
|
* @value: Value written or read
|
|
*/
|
|
struct iotrace_record {
|
|
enum iotrace_flags flags;
|
|
phys_addr_t addr;
|
|
iovalue_t value;
|
|
};
|
|
|
|
/**
|
|
* struct iotrace - current trace status and checksum
|
|
*
|
|
* @start: Start address of iotrace buffer
|
|
* @size: Size of iotrace buffer in bytes
|
|
* @offset: Current write offset into iotrace buffer
|
|
* @crc32: Current value of CRC chceksum of trace records
|
|
* @enabled: true if enabled, false if disabled
|
|
*/
|
|
static struct iotrace {
|
|
ulong start;
|
|
ulong size;
|
|
ulong offset;
|
|
u32 crc32;
|
|
bool enabled;
|
|
} iotrace;
|
|
|
|
static void add_record(int flags, const void *ptr, ulong value)
|
|
{
|
|
struct iotrace_record srec, *rec = &srec;
|
|
|
|
/*
|
|
* We don't support iotrace before relocation. Since the trace buffer
|
|
* is set up by a command, it can't be enabled at present. To change
|
|
* this we would need to set the iotrace buffer at build-time. See
|
|
* lib/trace.c for how this might be done if you are interested.
|
|
*/
|
|
if (!(gd->flags & GD_FLG_RELOC) || !iotrace.enabled)
|
|
return;
|
|
|
|
/* Store it if there is room */
|
|
if (iotrace.offset + sizeof(*rec) < iotrace.size) {
|
|
rec = (struct iotrace_record *)map_sysmem(
|
|
iotrace.start + iotrace.offset,
|
|
sizeof(value));
|
|
}
|
|
|
|
rec->flags = flags;
|
|
rec->addr = map_to_sysmem(ptr);
|
|
rec->value = value;
|
|
|
|
/* Update our checksum */
|
|
iotrace.crc32 = crc32(iotrace.crc32, (unsigned char *)rec,
|
|
sizeof(*rec));
|
|
|
|
iotrace.offset += sizeof(struct iotrace_record);
|
|
}
|
|
|
|
u32 iotrace_readl(const void *ptr)
|
|
{
|
|
u32 v;
|
|
|
|
v = readl(ptr);
|
|
add_record(IOT_32 | IOT_READ, ptr, v);
|
|
|
|
return v;
|
|
}
|
|
|
|
void iotrace_writel(ulong value, const void *ptr)
|
|
{
|
|
add_record(IOT_32 | IOT_WRITE, ptr, value);
|
|
writel(value, ptr);
|
|
}
|
|
|
|
u16 iotrace_readw(const void *ptr)
|
|
{
|
|
u32 v;
|
|
|
|
v = readw(ptr);
|
|
add_record(IOT_16 | IOT_READ, ptr, v);
|
|
|
|
return v;
|
|
}
|
|
|
|
void iotrace_writew(ulong value, const void *ptr)
|
|
{
|
|
add_record(IOT_16 | IOT_WRITE, ptr, value);
|
|
writew(value, ptr);
|
|
}
|
|
|
|
u8 iotrace_readb(const void *ptr)
|
|
{
|
|
u32 v;
|
|
|
|
v = readb(ptr);
|
|
add_record(IOT_8 | IOT_READ, ptr, v);
|
|
|
|
return v;
|
|
}
|
|
|
|
void iotrace_writeb(ulong value, const void *ptr)
|
|
{
|
|
add_record(IOT_8 | IOT_WRITE, ptr, value);
|
|
writeb(value, ptr);
|
|
}
|
|
|
|
void iotrace_reset_checksum(void)
|
|
{
|
|
iotrace.crc32 = 0;
|
|
}
|
|
|
|
u32 iotrace_get_checksum(void)
|
|
{
|
|
return iotrace.crc32;
|
|
}
|
|
|
|
void iotrace_set_enabled(int enable)
|
|
{
|
|
iotrace.enabled = enable;
|
|
}
|
|
|
|
int iotrace_get_enabled(void)
|
|
{
|
|
return iotrace.enabled;
|
|
}
|
|
|
|
void iotrace_set_buffer(ulong start, ulong size)
|
|
{
|
|
iotrace.start = start;
|
|
iotrace.size = size;
|
|
iotrace.offset = 0;
|
|
iotrace.crc32 = 0;
|
|
}
|
|
|
|
void iotrace_get_buffer(ulong *start, ulong *size, ulong *offset, ulong *count)
|
|
{
|
|
*start = iotrace.start;
|
|
*size = iotrace.size;
|
|
*offset = iotrace.offset;
|
|
*count = iotrace.offset / sizeof(struct iotrace_record);
|
|
}
|