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/* SPDX-License-Identifier: MIT */
#include "adt.h"
#include "tunables.h"
#include "types.h"
#include "utils.h"
struct tunable_info {
int node_offset;
int node_path[8];
const u32 *tunable_raw;
u32 tunable_len;
};
static int tunables_adt_find(const char *path, const char *prop, struct tunable_info *info,
u32 item_size)
{
info->node_offset = adt_path_offset_trace(adt, path, info->node_path);
if (info->node_offset < 0) {
printf("tunable: unable to find ADT node %s.\n", path);
return -1;
}
info->tunable_raw = adt_getprop(adt, info->node_offset, prop, &info->tunable_len);
if (info->tunable_raw == NULL || info->tunable_len == 0) {
printf("tunable: Error getting ADT node %s property %s .\n", path, prop);
return -1;
}
if (info->tunable_len % item_size) {
printf("tunable: tunable length needs to be a multiply of %d but is %d\n", item_size,
info->tunable_len);
return -1;
}
info->tunable_len /= item_size;
return 0;
}
struct tunable_global {
u32 reg_idx;
u32 offset;
u32 mask;
u32 value;
} PACKED;
int tunables_apply_global(const char *path, const char *prop)
{
struct tunable_info info;
if (tunables_adt_find(path, prop, &info, sizeof(struct tunable_global)) < 0)
return -1;
const struct tunable_global *tunables = (const struct tunable_global *)info.tunable_raw;
for (u32 i = 0; i < info.tunable_len; ++i) {
const struct tunable_global *tunable = &tunables[i];
u64 addr;
if (adt_get_reg(adt, info.node_path, "reg", tunable->reg_idx, &addr, NULL) < 0) {
printf("tunable: Error getting regs with index %d\n", tunable->reg_idx);
return -1;
}
mask32(addr + tunable->offset, tunable->mask, tunable->value);
}
return 0;
}
struct tunable_local {
u32 offset;
u32 size;
u64 mask;
u64 value;
} PACKED;
int tunables_apply_local_addr(const char *path, const char *prop, uintptr_t base)
{
struct tunable_info info;
if (tunables_adt_find(path, prop, &info, sizeof(struct tunable_local)) < 0)
return -1;
const struct tunable_local *tunables = (const struct tunable_local *)info.tunable_raw;
for (u32 i = 0; i < info.tunable_len; ++i) {
const struct tunable_local *tunable = &tunables[i];
switch (tunable->size) {
case 1:
mask8(base + tunable->offset, tunable->mask, tunable->value);
break;
case 2:
mask16(base + tunable->offset, tunable->mask, tunable->value);
break;
case 4:
mask32(base + tunable->offset, tunable->mask, tunable->value);
break;
case 8:
mask64(base + tunable->offset, tunable->mask, tunable->value);
break;
default:
printf("tunable: unknown tunable size 0x%08x\n", tunable->size);
return -1;
}
}
return 0;
}
int tunables_apply_local(const char *path, const char *prop, u32 reg_offset)
{
struct tunable_info info;
if (tunables_adt_find(path, prop, &info, sizeof(struct tunable_local)) < 0)
return -1;
u64 base;
if (adt_get_reg(adt, info.node_path, "reg", reg_offset, &base, NULL) < 0) {
printf("tunable: Error getting regs\n");
return -1;
}
return tunables_apply_local_addr(path, prop, base);
}
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