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kboot.c
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kboot.c
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/* SPDX-License-Identifier: MIT */
#include <stdint.h>
#include "kboot.h"
#include "adt.h"
#include "assert.h"
#include "clk.h"
#include "dapf.h"
#include "devicetree.h"
#include "display.h"
#include "exception.h"
#include "firmware.h"
#include "isp.h"
#include "malloc.h"
#include "mcc.h"
#include "memory.h"
#include "pcie.h"
#include "pmgr.h"
#include "sep.h"
#include "sio.h"
#include "smp.h"
#include "tunables.h"
#include "types.h"
#include "usb.h"
#include "utils.h"
#include "xnuboot.h"
#include "libfdt/libfdt.h"
#define MAX_CHOSEN_PARAMS 16
#define MAX_ATC_DEVS 8
#define MAX_CIO_DEVS 8
#define MAX_DISP_MAPPINGS 8
static void *dt = NULL;
static int dt_bufsize = 0;
static void *initrd_start = NULL;
static size_t initrd_size = 0;
static char *chosen_params[MAX_CHOSEN_PARAMS][2];
extern const char *const m1n1_version;
int dt_set_gpu(void *dt);
#define DT_ALIGN 16384
#define bail(...) \
do { \
printf(__VA_ARGS__); \
return -1; \
} while (0)
#define bail_cleanup(...) \
do { \
printf(__VA_ARGS__); \
ret = -1; \
goto err; \
} while (0)
void get_notchless_fb(u64 *fb_base, u64 *fb_height)
{
*fb_base = cur_boot_args.video.base;
*fb_height = cur_boot_args.video.height;
int node = adt_path_offset(adt, "/product");
if (node < 0) {
printf("FDT: /product node not found\n");
return;
}
u32 val;
if (ADT_GETPROP(adt, node, "partially-occluded-display", &val) < 0 || !val) {
printf("FDT: No notch detected\n");
return;
}
u64 hfrac = cur_boot_args.video.height * 16 / cur_boot_args.video.width;
u64 new_height = cur_boot_args.video.width * hfrac / 16;
if (new_height == cur_boot_args.video.height) {
printf("FDT: Notch detected, but display aspect is already 16:%lu?\n", hfrac);
return;
}
u64 offset = cur_boot_args.video.height - new_height;
printf("display: Hiding notch, %lux%lu -> %lux%lu (+%lu, 16:%lu)\n", cur_boot_args.video.width,
cur_boot_args.video.height, cur_boot_args.video.width, new_height, offset, hfrac);
*fb_base += cur_boot_args.video.stride * offset;
*fb_height = new_height;
}
static int dt_set_rng_seed_sep(int node)
{
u64 kaslr_seed;
uint8_t rng_seed[128]; // same size used by Linux for kexec
if (sep_get_random(&kaslr_seed, sizeof(kaslr_seed)) != sizeof(kaslr_seed))
bail("SEP: couldn't get enough random bytes for KASLR seed\n");
if (sep_get_random(rng_seed, sizeof(rng_seed)) != sizeof(rng_seed))
bail("SEP: couldn't get enough random bytes for RNG seed\n");
if (fdt_setprop_u64(dt, node, "kaslr-seed", kaslr_seed))
bail("FDT: couldn't set kaslr-seed\n");
if (fdt_setprop(dt, node, "rng-seed", rng_seed, sizeof(rng_seed)))
bail("FDT: couldn't set rng-seed\n");
printf("FDT: Passing %ld bytes of KASLR seed and %ld bytes of random seed\n",
sizeof(kaslr_seed), sizeof(rng_seed));
return 0;
}
static int dt_set_rng_seed_adt(int node)
{
int anode = adt_path_offset(adt, "/chosen");
if (anode < 0)
bail("ADT: /chosen not found\n");
const uint8_t *random_seed;
u32 seed_length;
random_seed = adt_getprop(adt, anode, "random-seed", &seed_length);
if (random_seed) {
printf("ADT: %d bytes of random seed available\n", seed_length);
if (seed_length >= sizeof(u64)) {
u64 kaslr_seed;
memcpy(&kaslr_seed, random_seed, sizeof(kaslr_seed));
// Ideally we would throw away the kaslr_seed part of random_seed
// and avoid reusing it. However, Linux wants 64 bytes of bootloader
// random seed to consider its CRNG initialized, which is exactly
// how much iBoot gives us. This probably doesn't matter, since
// that entropy is going to get shuffled together and Linux makes
// sure to clear the FDT randomness after using it anyway, but just
// in case let's mix in a few bits from our own KASLR base to make
// kaslr_seed unique.
kaslr_seed ^= (u64)cur_boot_args.virt_base;
if (fdt_setprop_u64(dt, node, "kaslr-seed", kaslr_seed))
bail("FDT: couldn't set kaslr-seed\n");
printf("FDT: KASLR seed initialized\n");
} else {
printf("ADT: not enough random data for kaslr-seed\n");
}
if (seed_length) {
if (fdt_setprop(dt, node, "rng-seed", random_seed, seed_length))
bail("FDT: couldn't set rng-seed\n");
printf("FDT: Passing %d bytes of random seed\n", seed_length);
}
} else {
printf("ADT: no random-seed available!\n");
}
return 0;
}
static int dt_set_chosen(void)
{
int node = fdt_path_offset(dt, "/chosen");
if (node < 0)
bail("FDT: /chosen node not found in devtree\n");
for (int i = 0; i < MAX_CHOSEN_PARAMS; i++) {
if (!chosen_params[i][0])
break;
const char *name = chosen_params[i][0];
const char *value = chosen_params[i][1];
if (fdt_setprop(dt, node, name, value, strlen(value) + 1) < 0)
bail("FDT: couldn't set chosen.%s property\n", name);
printf("FDT: %s = '%s'\n", name, value);
}
if (initrd_start && initrd_size) {
if (fdt_setprop_u64(dt, node, "linux,initrd-start", (u64)initrd_start))
bail("FDT: couldn't set chosen.linux,initrd-start property\n");
u64 end = ((u64)initrd_start) + initrd_size;
if (fdt_setprop_u64(dt, node, "linux,initrd-end", end))
bail("FDT: couldn't set chosen.linux,initrd-end property\n");
if (fdt_add_mem_rsv(dt, (u64)initrd_start, initrd_size))
bail("FDT: couldn't add reservation for the initrd\n");
printf("FDT: initrd at %p size 0x%lx\n", initrd_start, initrd_size);
}
if (cur_boot_args.video.base) {
int fb = fdt_path_offset(dt, "/chosen/framebuffer");
if (fb < 0)
bail("FDT: /chosen node not found in devtree\n");
u64 fb_base, fb_height;
get_notchless_fb(&fb_base, &fb_height);
u64 fb_size = cur_boot_args.video.stride * fb_height;
u64 fbreg[2] = {cpu_to_fdt64(fb_base), cpu_to_fdt64(fb_size)};
char fbname[32];
snprintf(fbname, sizeof(fbname), "framebuffer@%lx", fb_base);
if (fdt_setprop(dt, fb, "reg", fbreg, sizeof(fbreg)))
bail("FDT: couldn't set framebuffer.reg property\n");
if (fdt_set_name(dt, fb, fbname))
bail("FDT: couldn't set framebuffer name\n");
if (fdt_setprop_u32(dt, fb, "width", cur_boot_args.video.width))
bail("FDT: couldn't set framebuffer width\n");
if (fdt_setprop_u32(dt, fb, "height", fb_height))
bail("FDT: couldn't set framebuffer height\n");
if (fdt_setprop_u32(dt, fb, "stride", cur_boot_args.video.stride))
bail("FDT: couldn't set framebuffer stride\n");
const char *format = NULL;
switch (cur_boot_args.video.depth & 0xff) {
case 32:
format = "x8r8g8b8";
break;
case 30:
format = "x2r10g10b10";
break;
case 16:
format = "r5g6b5";
break;
default:
printf("FDT: unsupported fb depth %lu, not enabling\n", cur_boot_args.video.depth);
return 0; // Do not error out, but don't set the FB
}
if (fdt_setprop_string(dt, fb, "format", format))
bail("FDT: couldn't set framebuffer format\n");
fdt_delprop(dt, fb, "status"); // may fail if it does not exist
printf("FDT: %s base 0x%lx size 0x%lx\n", fbname, fb_base, fb_size);
// We do not need to reserve the framebuffer, as it will be excluded from the usable RAM
// range already.
// save notch height in the dcp node if present
if (cur_boot_args.video.height - fb_height) {
int dcp = fdt_path_offset(dt, "dcp");
if (dcp >= 0)
if (fdt_appendprop_u32(dt, dcp, "apple,notch-height",
cur_boot_args.video.height - fb_height))
printf("FDT: couldn't set apple,notch-height\n");
}
}
node = fdt_path_offset(dt, "/chosen");
if (node < 0)
bail("FDT: /chosen node not found in devtree\n");
if (fdt_setprop(dt, node, "asahi,iboot1-version", system_firmware.iboot,
strlen(system_firmware.iboot) + 1))
bail("FDT: couldn't set asahi,iboot1-version\n");
if (fdt_setprop(dt, node, "asahi,system-fw-version", system_firmware.string,
strlen(system_firmware.string) + 1))
bail("FDT: couldn't set asahi,system-fw-version\n");
if (fdt_setprop(dt, node, "asahi,iboot2-version", os_firmware.iboot,
strlen(os_firmware.iboot) + 1))
bail("FDT: couldn't set asahi,iboot2-version\n");
if (fdt_setprop(dt, node, "asahi,os-fw-version", os_firmware.string,
strlen(os_firmware.string) + 1))
bail("FDT: couldn't set asahi,os-fw-version\n");
if (fdt_setprop(dt, node, "asahi,m1n1-stage2-version", m1n1_version, strlen(m1n1_version) + 1))
bail("FDT: couldn't set asahi,m1n1-stage2-version\n");
if (dt_set_rng_seed_sep(node))
return dt_set_rng_seed_adt(node);
return 0;
}
static int dt_set_memory(void)
{
int anode = adt_path_offset(adt, "/chosen");
if (anode < 0)
bail("ADT: /chosen not found\n");
u64 dram_base, dram_size;
if (ADT_GETPROP(adt, anode, "dram-base", &dram_base) < 0)
bail("ADT: Failed to get dram-base\n");
if (ADT_GETPROP(adt, anode, "dram-size", &dram_size) < 0)
bail("ADT: Failed to get dram-size\n");
// Tell the kernel our usable memory range. We cannot declare all of DRAM, and just reserve the
// bottom and top, because the kernel would still map it (and just not use it), which breaks
// ioremap (e.g. simplefb).
u64 dram_min = cur_boot_args.phys_base;
u64 dram_max = cur_boot_args.phys_base + cur_boot_args.mem_size;
printf("FDT: DRAM at 0x%lx size 0x%lx\n", dram_base, dram_size);
printf("FDT: Usable memory is 0x%lx..0x%lx (0x%lx)\n", dram_min, dram_max, dram_max - dram_min);
u64 memreg[2] = {cpu_to_fdt64(dram_min), cpu_to_fdt64(dram_max - dram_min)};
int node = fdt_path_offset(dt, "/memory");
if (node < 0)
bail("FDT: /memory node not found in devtree\n");
if (fdt_setprop(dt, node, "reg", memreg, sizeof(memreg)))
bail("FDT: couldn't set memory.reg property\n");
return 0;
}
static int dt_set_serial_number(void)
{
int fdt_root = fdt_path_offset(dt, "/");
int adt_root = adt_path_offset(adt, "/");
if (fdt_root < 0)
bail("FDT: could not open a handle to FDT root.\n");
if (adt_root < 0)
bail("ADT: could not open a handle to ADT root.\n");
u32 sn_len;
const char *serial_number = adt_getprop(adt, adt_root, "serial-number", &sn_len);
if (fdt_setprop_string(dt, fdt_root, "serial-number", serial_number))
bail("FDT: unable to set device serial number!\n");
printf("FDT: reporting device serial number: %s\n", serial_number);
return 0;
}
static int dt_set_cpus(void)
{
int ret = 0;
int cpus = fdt_path_offset(dt, "/cpus");
if (cpus < 0)
bail("FDT: /cpus node not found in devtree\n");
uint32_t *pruned_phandles = calloc(MAX_CPUS, sizeof(uint32_t));
size_t pruned = 0;
if (!pruned_phandles)
bail("FDT: out of memory\n");
/* Prune CPU nodes */
int node, cpu = 0;
for (node = fdt_first_subnode(dt, cpus); node >= 0;) {
const char *name = fdt_get_name(dt, node, NULL);
if (strncmp(name, "cpu@", 4))
goto next_node;
if (cpu > MAX_CPUS)
bail_cleanup("Maximum number of CPUs exceeded, consider increasing MAX_CPUS\n");
const fdt64_t *prop = fdt_getprop(dt, node, "reg", NULL);
if (!prop)
bail_cleanup("FDT: failed to get reg property of CPU\n");
u64 dt_mpidr = fdt64_ld(prop);
if (dt_mpidr == (mrs(MPIDR_EL1) & 0xFFFFFF))
goto next_cpu;
if (!smp_is_alive(cpu)) {
printf("FDT: CPU %d is not alive, disabling...\n", cpu);
pruned_phandles[pruned++] = fdt_get_phandle(dt, node);
int next = fdt_next_subnode(dt, node);
fdt_nop_node(dt, node);
cpu++;
node = next;
continue;
}
u64 mpidr = smp_get_mpidr(cpu);
if (dt_mpidr != mpidr)
bail_cleanup("FDT: DT CPU %d MPIDR mismatch: 0x%lx != 0x%lx\n", cpu, dt_mpidr, mpidr);
u64 release_addr = smp_get_release_addr(cpu);
if (fdt_setprop_inplace_u64(dt, node, "cpu-release-addr", release_addr))
bail_cleanup("FDT: couldn't set cpu-release-addr property\n");
printf("FDT: CPU %d MPIDR=0x%lx release-addr=0x%lx\n", cpu, mpidr, release_addr);
next_cpu:
cpu++;
next_node:
node = fdt_next_subnode(dt, node);
}
if ((node < 0) && (node != -FDT_ERR_NOTFOUND)) {
bail_cleanup("FDT: error iterating through CPUs\n");
}
/* Prune AIC PMU affinities */
int aic = fdt_node_offset_by_compatible(dt, -1, "apple,aic");
if (aic == -FDT_ERR_NOTFOUND)
aic = fdt_node_offset_by_compatible(dt, -1, "apple,aic2");
if (aic < 0)
bail_cleanup("FDT: Failed to find AIC node\n");
int affinities = fdt_subnode_offset(dt, aic, "affinities");
if (affinities < 0) {
printf("FDT: Failed to find AIC affinities node, ignoring...\n");
} else {
int node;
for (node = fdt_first_subnode(dt, affinities); node >= 0;
node = fdt_next_subnode(dt, node)) {
int len;
const fdt32_t *phs = fdt_getprop(dt, node, "cpus", &len);
if (!phs)
bail_cleanup("FDT: Failed to find cpus property under AIC affinity\n");
fdt32_t *new_phs = calloc(len, 1);
size_t index = 0;
size_t count = len / sizeof(fdt32_t);
for (size_t i = 0; i < count; i++) {
uint32_t phandle = fdt32_ld(&phs[i]);
bool prune = false;
for (size_t j = 0; j < pruned; j++) {
if (pruned_phandles[j] == phandle) {
prune = true;
break;
}
}
if (!prune)
new_phs[index++] = phs[i];
}
ret = fdt_setprop(dt, node, "cpus", new_phs, sizeof(fdt32_t) * index);
free(new_phs);
if (ret < 0)
bail_cleanup("FDT: Failed to set cpus property under AIC affinity\n");
const char *name = fdt_get_name(dt, node, NULL);
printf("FDT: Pruned %ld/%ld CPU references in [AIC]/affinities/%s\n", count - index,
count, name);
}
if ((node < 0) && (node != -FDT_ERR_NOTFOUND))
bail_cleanup("FDT: Error iterating through affinity nodes\n");
}
/* Prune CPU-map */
int cpu_map = fdt_path_offset(dt, "/cpus/cpu-map");
if (cpu_map < 0) {
printf("FDT: /cpus/cpu-map node not found in devtree, ignoring...\n");
free(pruned_phandles);
return 0;
}
int cluster_idx = 0;
int cluster_node;
for (cluster_node = fdt_first_subnode(dt, cpu_map); cluster_node >= 0;) {
const char *name = fdt_get_name(dt, cluster_node, NULL);
int cpu_idx = 0;
if (strncmp(name, "cluster", 7))
goto next_cluster;
int cpu_node;
for (cpu_node = fdt_first_subnode(dt, cluster_node); cpu_node >= 0;) {
const char *cpu_name = fdt_get_name(dt, cpu_node, NULL);
if (strncmp(cpu_name, "core", 4))
goto next_map_cpu;
int len;
const fdt32_t *cpu_ph = fdt_getprop(dt, cpu_node, "cpu", &len);
if (!cpu_ph || len != sizeof(*cpu_ph))
bail_cleanup("FDT: Failed to get cpu prop for /cpus/cpu-map/%s/%s\n", name,
cpu_name);
uint32_t phandle = fdt32_ld(cpu_ph);
bool prune = false;
for (size_t i = 0; i < pruned; i++) {
if (pruned_phandles[i] == phandle) {
prune = true;
break;
}
}
if (prune) {
printf("FDT: Pruning /cpus/cpu-map/%s/%s\n", name, cpu_name);
int next = fdt_next_subnode(dt, cpu_node);
fdt_nop_node(dt, cpu_node);
cpu_node = next;
continue;
} else {
char new_name[16];
snprintf(new_name, 16, "core%d", cpu_idx++);
fdt_set_name(dt, cpu_node, new_name);
}
next_map_cpu:
cpu_node = fdt_next_subnode(dt, cpu_node);
}
if ((cpu_node < 0) && (cpu_node != -FDT_ERR_NOTFOUND))
bail_cleanup("FDT: Error iterating through CPU nodes\n");
if (cpu_idx == 0) {
printf("FDT: Pruning /cpus/cpu-map/%s\n", name);
int next = fdt_next_subnode(dt, cluster_node);
fdt_nop_node(dt, cluster_node);
cluster_node = next;
continue;
} else {
char new_name[16];
snprintf(new_name, 16, "cluster%d", cluster_idx++);
fdt_set_name(dt, cluster_node, new_name);
}
next_cluster:
cluster_node = fdt_next_subnode(dt, cluster_node);
}
if ((cluster_node < 0) && (cluster_node != -FDT_ERR_NOTFOUND))
bail_cleanup("FDT: Error iterating through CPU clusters\n");
return 0;
err:
free(pruned_phandles);
return ret;
}
static struct {
const char *alias;
const char *fdt_property;
bool swap;
} mac_address_devices[] = {
{
.alias = "bluetooth0",
.fdt_property = "local-bd-address",
.swap = true,
},
{
.alias = "ethernet0",
.fdt_property = "local-mac-address",
},
{
.alias = "wifi0",
.fdt_property = "local-mac-address",
},
};
static int dt_set_mac_addresses(void)
{
int anode = adt_path_offset(adt, "/chosen");
if (anode < 0)
bail("ADT: /chosen not found\n");
for (size_t i = 0; i < sizeof(mac_address_devices) / sizeof(*mac_address_devices); i++) {
char propname[32];
snprintf(propname, sizeof(propname), "mac-address-%s", mac_address_devices[i].alias);
uint8_t addr[6];
if (ADT_GETPROP_ARRAY(adt, anode, propname, addr) < 0)
continue;
if (mac_address_devices[i].swap) {
for (size_t i = 0; i < sizeof(addr) / 2; ++i) {
uint8_t tmp = addr[i];
addr[i] = addr[sizeof(addr) - i - 1];
addr[sizeof(addr) - i - 1] = tmp;
}
}
const char *path = fdt_get_alias(dt, mac_address_devices[i].alias);
if (path == NULL)
continue;
int node = fdt_path_offset(dt, path);
if (node < 0)
continue;
fdt_setprop(dt, node, mac_address_devices[i].fdt_property, addr, sizeof(addr));
}
return 0;
}
static int dt_set_bluetooth_cal(int anode, int node, const char *adt_name, const char *fdt_name)
{
u32 len;
const u8 *cal_blob = adt_getprop(adt, anode, adt_name, &len);
if (!cal_blob || !len)
bail("ADT: Failed to get %s\n", adt_name);
fdt_setprop(dt, node, fdt_name, cal_blob, len);
return 0;
}
static int dt_set_bluetooth(void)
{
int ret;
int anode = adt_path_offset(adt, "/arm-io/bluetooth");
if (anode < 0)
bail("ADT: /arm-io/bluetooth not found\n");
const char *path = fdt_get_alias(dt, "bluetooth0");
if (path == NULL)
return 0;
int node = fdt_path_offset(dt, path);
if (node < 0)
return 0;
ret = dt_set_bluetooth_cal(anode, node, "bluetooth-taurus-calibration-bf",
"brcm,taurus-bf-cal-blob");
if (ret)
return ret;
ret = dt_set_bluetooth_cal(anode, node, "bluetooth-taurus-calibration", "brcm,taurus-cal-blob");
if (ret)
return ret;
return 0;
}
static int dt_set_multitouch(void)
{
const char *path = fdt_get_alias(dt, "touchbar0");
if (path == NULL)
return 0;
int node = fdt_path_offset(dt, path);
if (node < 0)
bail("FDT: alias points at nonexistent node\n");
const char *adt_touchbar;
if (fdt_node_check_compatible(dt, 0, "apple,j293") == 0)
adt_touchbar = "/arm-io/spi0/multi-touch";
else if (fdt_node_check_compatible(dt, 0, "apple,j493") == 0)
adt_touchbar = "/arm-io/spi3/touch-bar";
else
return 0;
int anode = adt_path_offset(adt, adt_touchbar);
if (anode < 0)
bail("ADT: touchbar node %s not found\n", adt_touchbar);
u32 len;
const u8 *cal_blob = adt_getprop(adt, anode, "multi-touch-calibration", &len);
if (!cal_blob || !len) {
printf("ADT: Failed to get multi-touch-calibration from %s, disable %s\n", adt_touchbar,
fdt_get_name(dt, node, NULL));
fdt_setprop_string(dt, node, "status", "disabled");
return 0;
}
fdt_setprop(dt, node, "apple,z2-cal-blob", cal_blob, len);
return 0;
}
#include "keyboard_types.h"
static int dt_set_ipd(void)
{
int chosen = fdt_path_offset(dt, "/chosen");
if (chosen < 0)
bail("FDT: /chosen node not found in devtree\n");
int ipd = adt_path_offset(adt, "/arm-io/spi3/ipd");
if (ipd < 0)
ipd = adt_path_offset(adt, "/arm-io/dockchannel-mtp/mtp-transport/keyboard");
if (ipd < 0) {
printf("ADT: no keyboard found\n");
return 0;
}
u32 len;
const u8 *kblang = adt_getprop(adt, ipd, "kblang-calibration", &len);
if (!kblang || len < 2) {
printf("ADT: kblang-calibration not found, no keyboard layout\n");
return 0;
}
u8 code = kblang[1];
if (fdt_setprop_u32(dt, chosen, "asahi,kblang-code", code))
bail("FDT: couldn't set asahi,kblang-code\n");
const char *path = fdt_get_alias(dt, "keyboard");
if (path == NULL)
return 0;
int node = fdt_path_offset(dt, path);
if (node < 0)
bail("FDT: keyboard alias points at nonexistent node\n");
if (fdt_setprop_u32(dt, node, "apple,keyboard-layout-id", code))
bail("FDT: couldn't set apple,keyboard-layout-id\n");
if (code >= ARRAY_SIZE(keyboard_types))
printf("ADT: kblang code out of range, not setting country code\n");
else if (fdt_setprop_u32(dt, node, "hid-country-code", keyboard_types[code]))
bail("FDT: couldn't set hid-country-code\n");
return 0;
}
#define NVRAM_START 0x700000
#define NVRAM_MAX_SIZE SZ_1M
static int dt_set_nvram(void)
{
int adt_path[8];
u64 start, size;
int anode = adt_path_offset_trace(adt, "/arm-io/spi1/spinor/anvram", adt_path);
if (anode < 0) {
printf("ADT: nvram partition not found\n");
return 0;
}
int pp = 0;
while (adt_path[pp])
pp++;
adt_path[pp + 1] = 0;
int ret = adt_get_reg(adt, adt_path, "reg", 0, &start, &size);
if (ret < 0) {
printf("ADT: could not read nvram partition start/size\n");
return 0;
}
if (start != NVRAM_START || size > NVRAM_MAX_SIZE) {
printf("ADT: unexpected nvram partition start (0x%lx) size (0x%lx)\n", start, size);
return 0;
}
int node = fdt_path_offset(dt, "nvram");
if (node < 0) {
printf("DT: nvram alias/partition not found\n");
return 0;
}
fdt32_t reg[2];
fdt32_st(reg + 0, start);
fdt32_st(reg + 1, size);
if (fdt_setprop(dt, node, "reg", reg, sizeof(reg))) {
printf("FDT: couldn't set nvram.reg\n");
return 0;
}
if (fdt_setprop_string(dt, node, "status", "okay") < 0)
printf("FDT: failed to enable nvram partition node\n");
return 0;
}
static int dt_set_wifi(void)
{
int anode = adt_path_offset(adt, "/arm-io/wlan");
if (anode < 0)
bail("ADT: /arm-io/wlan not found\n");
uint8_t info[16];
if (ADT_GETPROP_ARRAY(adt, anode, "wifi-antenna-sku-info", info) < 0)
bail("ADT: Failed to get wifi-antenna-sku-info\n");
const char *path = fdt_get_alias(dt, "wifi0");
if (path == NULL)
return 0;
int node = fdt_path_offset(dt, path);
if (node < 0)
return 0;
char antenna[8];
memcpy(antenna, &info[8], sizeof(antenna));
fdt_setprop_string(dt, node, "apple,antenna-sku", antenna);
u32 len;
const u8 *cal_blob = adt_getprop(adt, anode, "wifi-calibration-msf", &len);
if (!cal_blob || !len)
bail("ADT: Failed to get wifi-calibration-msf\n");
fdt_setprop(dt, node, "brcm,cal-blob", cal_blob, len);
return 0;
}
static void dt_set_uboot_dm_preloc(int node)
{
// Tell U-Boot to bind this node early
fdt_setprop_empty(dt, node, "u-boot,dm-pre-reloc");
fdt_setprop_empty(dt, node, "bootph-all");
// Make sure the power domains are bound early as well
int pds_size;
const fdt32_t *pds = fdt_getprop(dt, node, "power-domains", &pds_size);
if (!pds)
return;
fdt32_t *phandles = calloc(pds_size, 1);
if (!phandles) {
printf("FDT: out of memory\n");
return;
}
memcpy(phandles, pds, pds_size);
for (int i = 0; i < pds_size / 4; i++) {
node = fdt_node_offset_by_phandle(dt, fdt32_ld(&phandles[i]));
if (node < 0)
continue;
dt_set_uboot_dm_preloc(node);
// restore node offset after DT update
node = fdt_node_offset_by_phandle(dt, fdt32_ld(&phandles[i]));
if (node < 0)
continue;
// And make sure the PMGR node is bound early too
node = fdt_parent_offset(dt, node);
if (node < 0)
continue;
dt_set_uboot_dm_preloc(node);
}
free(phandles);
}
static int dt_set_uboot(void)
{
// Make sure that U-Boot can initialize the serial port in its
// pre-relocation phase by marking its node and the nodes of the
// power domains it depends on with a "u-boot,dm-pre-reloc"
// property.
const char *path = fdt_get_alias(dt, "serial0");
if (path == NULL)
return 0;
int node = fdt_path_offset(dt, path);
if (node < 0)
return 0;
dt_set_uboot_dm_preloc(node);
return 0;
}
struct atc_tunable {
u32 offset : 24;
u32 size : 8;
u32 mask;
u32 value;
} PACKED;
static_assert(sizeof(struct atc_tunable) == 12, "Invalid atc_tunable size");
struct adt_tunable_info {
const char *adt_name;
const char *fdt_name;
size_t reg_offset;
size_t reg_size;
bool required;
};
static const struct adt_tunable_info atc_tunables[] = {
/* global tunables applied after power on or reset */
{"tunable_ATC0AXI2AF", "apple,tunable-axi2af", 0x0, 0x4000, true},
{"tunable_ATC_FABRIC", "apple,tunable-common", 0x45000, 0x4000, true},
{"tunable_AUS_CMN_TOP", "apple,tunable-common", 0x800, 0x4000, true},
{"tunable_AUS_CMN_SHM", "apple,tunable-common", 0xa00, 0x4000, true},
{"tunable_AUSPLL_CORE", "apple,tunable-common", 0x2200, 0x4000, true},
{"tunable_AUSPLL_TOP", "apple,tunable-common", 0x2000, 0x4000, true},
{"tunable_CIO3PLL_CORE", "apple,tunable-common", 0x2a00, 0x4000, true},
{"tunable_CIO3PLL_TOP", "apple,tunable-common", 0x2800, 0x4000, true},
{"tunable_CIO_CIO3PLL_TOP", "apple,tunable-common", 0x2800, 0x4000, false},
{"tunable_USB_ACIOPHY_TOP", "apple,tunable-common", 0x0, 0x4000, true},
/* lane-specific tunables applied after a cable is connected */
{"tunable_DP_LN0_AUSPMA_TX_TOP", "apple,tunable-lane0-dp", 0xc000, 0x1000, true},
{"tunable_DP_LN1_AUSPMA_TX_TOP", "apple,tunable-lane1-dp", 0x13000, 0x1000, true},
{"tunable_USB_LN0_AUSPMA_RX_TOP", "apple,tunable-lane0-usb", 0x9000, 0x1000, true},
{"tunable_USB_LN0_AUSPMA_RX_EQ", "apple,tunable-lane0-usb", 0xa000, 0x1000, true},
{"tunable_USB_LN0_AUSPMA_RX_SHM", "apple,tunable-lane0-usb", 0xb000, 0x1000, true},
{"tunable_USB_LN0_AUSPMA_TX_TOP", "apple,tunable-lane0-usb", 0xc000, 0x1000, true},
{"tunable_USB_LN1_AUSPMA_RX_TOP", "apple,tunable-lane1-usb", 0x10000, 0x1000, true},
{"tunable_USB_LN1_AUSPMA_RX_EQ", "apple,tunable-lane1-usb", 0x11000, 0x1000, true},
{"tunable_USB_LN1_AUSPMA_RX_SHM", "apple,tunable-lane1-usb", 0x12000, 0x1000, true},
{"tunable_USB_LN1_AUSPMA_TX_TOP", "apple,tunable-lane1-usb", 0x13000, 0x1000, true},
{"tunable_CIO_LN0_AUSPMA_RX_TOP", "apple,tunable-lane0-cio", 0x9000, 0x1000, true},
{"tunable_CIO_LN0_AUSPMA_RX_EQ", "apple,tunable-lane0-cio", 0xa000, 0x1000, true},
{"tunable_CIO_LN0_AUSPMA_RX_SHM", "apple,tunable-lane0-cio", 0xb000, 0x1000, true},
{"tunable_CIO_LN0_AUSPMA_TX_TOP", "apple,tunable-lane0-cio", 0xc000, 0x1000, true},
{"tunable_CIO_LN1_AUSPMA_RX_TOP", "apple,tunable-lane1-cio", 0x10000, 0x1000, true},
{"tunable_CIO_LN1_AUSPMA_RX_EQ", "apple,tunable-lane1-cio", 0x11000, 0x1000, true},
{"tunable_CIO_LN1_AUSPMA_RX_SHM", "apple,tunable-lane1-cio", 0x12000, 0x1000, true},
{"tunable_CIO_LN1_AUSPMA_TX_TOP", "apple,tunable-lane1-cio", 0x13000, 0x1000, true},
};
static int dt_append_atc_tunable(int adt_node, int fdt_node,
const struct adt_tunable_info *tunable_info)
{
u32 tunables_len;
const struct atc_tunable *tunable_adt =
adt_getprop(adt, adt_node, tunable_info->adt_name, &tunables_len);
if (!tunable_adt) {
printf("ADT: tunable %s not found\n", tunable_info->adt_name);
if (tunable_info->required)
return -1;
else
return 0;
}
if (tunables_len % sizeof(*tunable_adt)) {
printf("ADT: tunable %s with invalid length %d\n", tunable_info->adt_name, tunables_len);
return -1;
}
u32 n_tunables = tunables_len / sizeof(*tunable_adt);
for (size_t j = 0; j < n_tunables; j++) {
const struct atc_tunable *tunable = &tunable_adt[j];
if (tunable->size != 32) {
printf("kboot: ATC tunable has invalid size %d\n", tunable->size);
return -1;
}
if (tunable->offset % (tunable->size / 8)) {
printf("kboot: ATC tunable has unaligned offset %x\n", tunable->offset);
return -1;
}
if (tunable->offset + (tunable->size / 8) > tunable_info->reg_size) {
printf("kboot: ATC tunable has invalid offset %x\n", tunable->offset);
return -1;
}
if (fdt_appendprop_u32(dt, fdt_node, tunable_info->fdt_name,
tunable->offset + tunable_info->reg_offset) < 0)
return -1;
if (fdt_appendprop_u32(dt, fdt_node, tunable_info->fdt_name, tunable->mask) < 0)
return -1;
if (fdt_appendprop_u32(dt, fdt_node, tunable_info->fdt_name, tunable->value) < 0)
return -1;
}
return 0;
}
static void dt_copy_atc_tunables(const char *adt_path, const char *dt_alias)
{
int ret;
int adt_node = adt_path_offset(adt, adt_path);
if (adt_node < 0)
return;
const char *fdt_path = fdt_get_alias(dt, dt_alias);
if (fdt_path == NULL) {
printf("FDT: Unable to find alias %s\n", dt_alias);
return;
}
int fdt_node = fdt_path_offset(dt, fdt_path);
if (fdt_node < 0) {
printf("FDT: Unable to find path %s for alias %s\n", fdt_path, dt_alias);
return;
}
for (size_t i = 0; i < sizeof(atc_tunables) / sizeof(*atc_tunables); ++i) {
ret = dt_append_atc_tunable(adt_node, fdt_node, &atc_tunables[i]);