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tunables_static: New module to set up static tunables
This is for things that xnu hard-codes. This first one for AGX is required to make coprocessor TLB coherency work properly... Signed-off-by: Asahi Lina <lina@asahilina.net>
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4 changed files with 72 additions and 1 deletions
2
Makefile
2
Makefile
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@ -116,7 +116,7 @@ OBJECTS := \
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start.o \
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startup.o \
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string.o \
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tunables.o \
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tunables.o tunables_static.o \
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tps6598x.o \
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uart.o \
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uartproxy.o \
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@ -10,6 +10,7 @@
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#include "pcie.h"
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#include "sep.h"
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#include "smp.h"
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#include "tunables.h"
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#include "types.h"
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#include "usb.h"
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#include "utils.h"
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@ -1149,6 +1150,7 @@ int kboot_boot(void *kernel)
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usb_init();
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pcie_init();
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dapf_init_all();
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tunables_apply_static();
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printf("Setting SMP mode to WFE...\n");
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smp_set_wfe_mode(true);
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@ -37,4 +37,6 @@ int tunables_apply_local(const char *path, const char *prop, u32 reg_idx);
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*/
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int tunables_apply_local_addr(const char *path, const char *prop, uintptr_t base);
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int tunables_apply_static(void);
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#endif
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67
src/tunables_static.c
Normal file
67
src/tunables_static.c
Normal file
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@ -0,0 +1,67 @@
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/* SPDX-License-Identifier: MIT */
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#include "tunables.h"
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#include "adt.h"
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#include "pmgr.h"
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#include "soc.h"
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#include "types.h"
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#include "utils.h"
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/*
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* These magic tunable sequences are hardcoded in various places in XNU, and are required for
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* proper operation of various fabric features and other miscellanea. Without them, things tend
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* to subtly break...
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*/
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struct entry {
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u32 offset;
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u32 clear;
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u32 set;
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};
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struct entry t8103_agx_tunables[] = {
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{0x30, 0xffffffff, 0x50014}, {0x34, 0xffffffff, 0xa003c},
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{0x400, 0x400103ff, 0x40010001}, {0x600, 0x1ffffff, 0x1ffffff},
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{0x738, 0x1ff01ff, 0x140034}, {0x798, 0x1ff01ff, 0x14003c},
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{0x800, 0x100, 0x100}, {-1, 0, 0},
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};
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static void tunables_apply(u64 base, struct entry *entry)
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{
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while (entry->offset != UINT32_MAX) {
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mask32(base + entry->offset, entry->clear, entry->set);
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entry++;
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}
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}
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int power_and_apply(const char *path, u64 base, struct entry *entries)
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{
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if (pmgr_adt_power_enable(path) < 0) {
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printf("tunables: Failed to enable power: %s\n", path);
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return -1;
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}
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tunables_apply(base, entries);
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if (pmgr_adt_power_disable(path) < 0) {
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printf("tunables: Failed to disable power: %s\n", path);
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return -1;
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}
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return 0;
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}
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int tunables_apply_static(void)
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{
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int ret = 0;
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switch (chip_id) {
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case T8103:
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ret |= power_and_apply("/arm-io/sgx", 0x205000000, t8103_agx_tunables);
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break;
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default:
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break;
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}
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return ret ? -1 : 0;
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}
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