378 lines
8.5 KiB
C
378 lines
8.5 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* devtree.c - convenience functions for device tree manipulation
|
||
|
|
* Copyright 2007 David Gibson, IBM Corporation.
|
||
|
|
* Copyright (c) 2007 Freescale Semiconductor, Inc.
|
||
|
|
*
|
||
|
|
* Authors: David Gibson <david@gibson.dropbear.id.au>
|
||
|
|
* Scott Wood <scottwood@freescale.com>
|
||
|
|
*/
|
||
|
|
#include <stdarg.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
#include "types.h"
|
||
|
|
#include "string.h"
|
||
|
|
#include "stdio.h"
|
||
|
|
#include "ops.h"
|
||
|
|
#include "of.h"
|
||
|
|
|
||
|
|
void dt_fixup_memory(u64 start, u64 size)
|
||
|
|
{
|
||
|
|
void *root, *memory;
|
||
|
|
int naddr, nsize, i;
|
||
|
|
u32 memreg[4];
|
||
|
|
|
||
|
|
root = finddevice("/");
|
||
|
|
if (getprop(root, "#address-cells", &naddr, sizeof(naddr)) < 0)
|
||
|
|
naddr = 2;
|
||
|
|
else
|
||
|
|
naddr = be32_to_cpu(naddr);
|
||
|
|
if (naddr < 1 || naddr > 2)
|
||
|
|
fatal("Can't cope with #address-cells == %d in /\n\r", naddr);
|
||
|
|
|
||
|
|
if (getprop(root, "#size-cells", &nsize, sizeof(nsize)) < 0)
|
||
|
|
nsize = 1;
|
||
|
|
else
|
||
|
|
nsize = be32_to_cpu(nsize);
|
||
|
|
if (nsize < 1 || nsize > 2)
|
||
|
|
fatal("Can't cope with #size-cells == %d in /\n\r", nsize);
|
||
|
|
|
||
|
|
i = 0;
|
||
|
|
if (naddr == 2)
|
||
|
|
memreg[i++] = cpu_to_be32(start >> 32);
|
||
|
|
memreg[i++] = cpu_to_be32(start & 0xffffffff);
|
||
|
|
if (nsize == 2)
|
||
|
|
memreg[i++] = cpu_to_be32(size >> 32);
|
||
|
|
memreg[i++] = cpu_to_be32(size & 0xffffffff);
|
||
|
|
|
||
|
|
memory = finddevice("/memory");
|
||
|
|
if (! memory) {
|
||
|
|
memory = create_node(NULL, "memory");
|
||
|
|
setprop_str(memory, "device_type", "memory");
|
||
|
|
}
|
||
|
|
|
||
|
|
printf("Memory <- <0x%x", be32_to_cpu(memreg[0]));
|
||
|
|
for (i = 1; i < (naddr + nsize); i++)
|
||
|
|
printf(" 0x%x", be32_to_cpu(memreg[i]));
|
||
|
|
printf("> (%ldMB)\n\r", (unsigned long)(size >> 20));
|
||
|
|
|
||
|
|
setprop(memory, "reg", memreg, (naddr + nsize)*sizeof(u32));
|
||
|
|
}
|
||
|
|
|
||
|
|
#define MHZ(x) ((x + 500000) / 1000000)
|
||
|
|
|
||
|
|
void dt_fixup_cpu_clocks(u32 cpu, u32 tb, u32 bus)
|
||
|
|
{
|
||
|
|
void *devp = NULL;
|
||
|
|
|
||
|
|
printf("CPU clock-frequency <- 0x%x (%dMHz)\n\r", cpu, MHZ(cpu));
|
||
|
|
printf("CPU timebase-frequency <- 0x%x (%dMHz)\n\r", tb, MHZ(tb));
|
||
|
|
if (bus > 0)
|
||
|
|
printf("CPU bus-frequency <- 0x%x (%dMHz)\n\r", bus, MHZ(bus));
|
||
|
|
|
||
|
|
while ((devp = find_node_by_devtype(devp, "cpu"))) {
|
||
|
|
setprop_val(devp, "clock-frequency", cpu_to_be32(cpu));
|
||
|
|
setprop_val(devp, "timebase-frequency", cpu_to_be32(tb));
|
||
|
|
if (bus > 0)
|
||
|
|
setprop_val(devp, "bus-frequency", cpu_to_be32(bus));
|
||
|
|
}
|
||
|
|
|
||
|
|
timebase_period_ns = 1000000000 / tb;
|
||
|
|
}
|
||
|
|
|
||
|
|
void dt_fixup_clock(const char *path, u32 freq)
|
||
|
|
{
|
||
|
|
void *devp = finddevice(path);
|
||
|
|
|
||
|
|
if (devp) {
|
||
|
|
printf("%s: clock-frequency <- %x (%dMHz)\n\r", path, freq, MHZ(freq));
|
||
|
|
setprop_val(devp, "clock-frequency", cpu_to_be32(freq));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr)
|
||
|
|
{
|
||
|
|
void *devp = find_node_by_alias(alias);
|
||
|
|
|
||
|
|
if (devp) {
|
||
|
|
printf("%s: local-mac-address <-"
|
||
|
|
" %02x:%02x:%02x:%02x:%02x:%02x\n\r", alias,
|
||
|
|
addr[0], addr[1], addr[2],
|
||
|
|
addr[3], addr[4], addr[5]);
|
||
|
|
|
||
|
|
setprop(devp, "local-mac-address", addr, 6);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void dt_fixup_mac_address(u32 index, const u8 *addr)
|
||
|
|
{
|
||
|
|
void *devp = find_node_by_prop_value(NULL, "linux,network-index",
|
||
|
|
(void*)&index, sizeof(index));
|
||
|
|
|
||
|
|
if (devp) {
|
||
|
|
printf("ENET%d: local-mac-address <-"
|
||
|
|
" %02x:%02x:%02x:%02x:%02x:%02x\n\r", index,
|
||
|
|
addr[0], addr[1], addr[2],
|
||
|
|
addr[3], addr[4], addr[5]);
|
||
|
|
|
||
|
|
setprop(devp, "local-mac-address", addr, 6);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void __dt_fixup_mac_addresses(u32 startindex, ...)
|
||
|
|
{
|
||
|
|
va_list ap;
|
||
|
|
u32 index = startindex;
|
||
|
|
const u8 *addr;
|
||
|
|
|
||
|
|
va_start(ap, startindex);
|
||
|
|
|
||
|
|
while ((addr = va_arg(ap, const u8 *)))
|
||
|
|
dt_fixup_mac_address(index++, addr);
|
||
|
|
|
||
|
|
va_end(ap);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define MAX_ADDR_CELLS 4
|
||
|
|
|
||
|
|
void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize)
|
||
|
|
{
|
||
|
|
if (getprop(node, "#address-cells", naddr, 4) != 4)
|
||
|
|
*naddr = 2;
|
||
|
|
else
|
||
|
|
*naddr = be32_to_cpu(*naddr);
|
||
|
|
if (getprop(node, "#size-cells", nsize, 4) != 4)
|
||
|
|
*nsize = 1;
|
||
|
|
else
|
||
|
|
*nsize = be32_to_cpu(*nsize);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void copy_val(u32 *dest, u32 *src, int naddr)
|
||
|
|
{
|
||
|
|
int pad = MAX_ADDR_CELLS - naddr;
|
||
|
|
|
||
|
|
memset(dest, 0, pad * 4);
|
||
|
|
memcpy(dest + pad, src, naddr * 4);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sub_reg(u32 *reg, u32 *sub)
|
||
|
|
{
|
||
|
|
int i, borrow = 0;
|
||
|
|
|
||
|
|
for (i = MAX_ADDR_CELLS - 1; i >= 0; i--) {
|
||
|
|
int prev_borrow = borrow;
|
||
|
|
borrow = reg[i] < sub[i] + prev_borrow;
|
||
|
|
reg[i] -= sub[i] + prev_borrow;
|
||
|
|
}
|
||
|
|
|
||
|
|
return !borrow;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int add_reg(u32 *reg, u32 *add, int naddr)
|
||
|
|
{
|
||
|
|
int i, carry = 0;
|
||
|
|
|
||
|
|
for (i = MAX_ADDR_CELLS - 1; i >= MAX_ADDR_CELLS - naddr; i--) {
|
||
|
|
u64 tmp = (u64)be32_to_cpu(reg[i]) + be32_to_cpu(add[i]) + carry;
|
||
|
|
carry = tmp >> 32;
|
||
|
|
reg[i] = cpu_to_be32((u32)tmp);
|
||
|
|
}
|
||
|
|
|
||
|
|
return !carry;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* It is assumed that if the first byte of reg fits in a
|
||
|
|
* range, then the whole reg block fits.
|
||
|
|
*/
|
||
|
|
static int compare_reg(u32 *reg, u32 *range, u32 *rangesize)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
u32 end;
|
||
|
|
|
||
|
|
for (i = 0; i < MAX_ADDR_CELLS; i++) {
|
||
|
|
if (be32_to_cpu(reg[i]) < be32_to_cpu(range[i]))
|
||
|
|
return 0;
|
||
|
|
if (be32_to_cpu(reg[i]) > be32_to_cpu(range[i]))
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < MAX_ADDR_CELLS; i++) {
|
||
|
|
end = be32_to_cpu(range[i]) + be32_to_cpu(rangesize[i]);
|
||
|
|
|
||
|
|
if (be32_to_cpu(reg[i]) < end)
|
||
|
|
break;
|
||
|
|
if (be32_to_cpu(reg[i]) > end)
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return reg[i] != end;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* reg must be MAX_ADDR_CELLS */
|
||
|
|
static int find_range(u32 *reg, u32 *ranges, int nregaddr,
|
||
|
|
int naddr, int nsize, int buflen)
|
||
|
|
{
|
||
|
|
int nrange = nregaddr + naddr + nsize;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i + nrange <= buflen; i += nrange) {
|
||
|
|
u32 range_addr[MAX_ADDR_CELLS];
|
||
|
|
u32 range_size[MAX_ADDR_CELLS];
|
||
|
|
|
||
|
|
copy_val(range_addr, ranges + i, nregaddr);
|
||
|
|
copy_val(range_size, ranges + i + nregaddr + naddr, nsize);
|
||
|
|
|
||
|
|
if (compare_reg(reg, range_addr, range_size))
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Currently only generic buses without special encodings are supported.
|
||
|
|
* In particular, PCI is not supported. Also, only the beginning of the
|
||
|
|
* reg block is tracked; size is ignored except in ranges.
|
||
|
|
*/
|
||
|
|
static u32 prop_buf[MAX_PROP_LEN / 4];
|
||
|
|
|
||
|
|
static int dt_xlate(void *node, int res, int reglen, unsigned long *addr,
|
||
|
|
unsigned long *size)
|
||
|
|
{
|
||
|
|
u32 last_addr[MAX_ADDR_CELLS];
|
||
|
|
u32 this_addr[MAX_ADDR_CELLS];
|
||
|
|
void *parent;
|
||
|
|
u64 ret_addr, ret_size;
|
||
|
|
u32 naddr, nsize, prev_naddr, prev_nsize;
|
||
|
|
int buflen, offset;
|
||
|
|
|
||
|
|
parent = get_parent(node);
|
||
|
|
if (!parent)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
dt_get_reg_format(parent, &naddr, &nsize);
|
||
|
|
if (nsize > 2)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
offset = (naddr + nsize) * res;
|
||
|
|
|
||
|
|
if (reglen < offset + naddr + nsize ||
|
||
|
|
MAX_PROP_LEN < (offset + naddr + nsize) * 4)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
copy_val(last_addr, prop_buf + offset, naddr);
|
||
|
|
|
||
|
|
ret_size = be32_to_cpu(prop_buf[offset + naddr]);
|
||
|
|
if (nsize == 2) {
|
||
|
|
ret_size <<= 32;
|
||
|
|
ret_size |= be32_to_cpu(prop_buf[offset + naddr + 1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
prev_naddr = naddr;
|
||
|
|
prev_nsize = nsize;
|
||
|
|
node = parent;
|
||
|
|
|
||
|
|
parent = get_parent(node);
|
||
|
|
if (!parent)
|
||
|
|
break;
|
||
|
|
|
||
|
|
dt_get_reg_format(parent, &naddr, &nsize);
|
||
|
|
|
||
|
|
buflen = getprop(node, "ranges", prop_buf,
|
||
|
|
sizeof(prop_buf));
|
||
|
|
if (buflen == 0)
|
||
|
|
continue;
|
||
|
|
if (buflen < 0 || buflen > sizeof(prop_buf))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
offset = find_range(last_addr, prop_buf, prev_naddr,
|
||
|
|
naddr, prev_nsize, buflen / 4);
|
||
|
|
if (offset < 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
copy_val(this_addr, prop_buf + offset, prev_naddr);
|
||
|
|
|
||
|
|
if (!sub_reg(last_addr, this_addr))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
copy_val(this_addr, prop_buf + offset + prev_naddr, naddr);
|
||
|
|
|
||
|
|
if (!add_reg(last_addr, this_addr, naddr))
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (naddr > 2)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
ret_addr = ((u64)be32_to_cpu(last_addr[2]) << 32) | be32_to_cpu(last_addr[3]);
|
||
|
|
if (sizeof(void *) == 4 &&
|
||
|
|
(ret_addr >= 0x100000000ULL || ret_size > 0x100000000ULL ||
|
||
|
|
ret_addr + ret_size > 0x100000000ULL))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
*addr = ret_addr;
|
||
|
|
if (size)
|
||
|
|
*size = ret_size;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size)
|
||
|
|
{
|
||
|
|
int reglen;
|
||
|
|
|
||
|
|
reglen = getprop(node, "reg", prop_buf, sizeof(prop_buf)) / 4;
|
||
|
|
return dt_xlate(node, res, reglen, addr, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr)
|
||
|
|
{
|
||
|
|
|
||
|
|
if (buflen > sizeof(prop_buf))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
memcpy(prop_buf, buf, buflen);
|
||
|
|
return dt_xlate(node, 0, buflen / 4, xlated_addr, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
int dt_is_compatible(void *node, const char *compat)
|
||
|
|
{
|
||
|
|
char *buf = (char *)prop_buf;
|
||
|
|
int len, pos;
|
||
|
|
|
||
|
|
len = getprop(node, "compatible", buf, MAX_PROP_LEN);
|
||
|
|
if (len < 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
for (pos = 0; pos < len; pos++) {
|
||
|
|
if (!strcmp(buf + pos, compat))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
pos += strnlen(&buf[pos], len - pos);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int dt_get_virtual_reg(void *node, void **addr, int nres)
|
||
|
|
{
|
||
|
|
unsigned long xaddr;
|
||
|
|
int n, i;
|
||
|
|
|
||
|
|
n = getprop(node, "virtual-reg", addr, nres * 4);
|
||
|
|
if (n > 0) {
|
||
|
|
for (i = 0; i < n/4; i ++)
|
||
|
|
((u32 *)addr)[i] = be32_to_cpu(((u32 *)addr)[i]);
|
||
|
|
return n / 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (n = 0; n < nres; n++) {
|
||
|
|
if (!dt_xlate_reg(node, n, &xaddr, NULL))
|
||
|
|
break;
|
||
|
|
|
||
|
|
addr[n] = (void *)xaddr;
|
||
|
|
}
|
||
|
|
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
|