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/* SPDX-License-Identifier: MIT */
#include <assert.h>
#include <stdarg.h>
#include "utils.h"
#include "iodev.h"
#include "smp.h"
#include "types.h"
#include "vsprintf.h"
#include "xnuboot.h"
static char ascii(char s)
{
if (s < 0x20)
return '.';
if (s > 0x7E)
return '.';
return s;
}
void hexdump(const void *d, size_t len)
{
u8 *data;
size_t i, off;
data = (u8 *)d;
for (off = 0; off < len; off += 16) {
printf("%08lx ", off);
for (i = 0; i < 16; i++) {
if ((i + off) >= len)
printf(" ");
else
printf("%02x ", data[off + i]);
}
printf(" ");
for (i = 0; i < 16; i++) {
if ((i + off) >= len)
printf(" ");
else
printf("%c", ascii(data[off + i]));
}
printf("\n");
}
}
void regdump(u64 addr, size_t len)
{
u64 i, off;
for (off = 0; off < len; off += 32) {
printf("%016lx ", addr + off);
for (i = 0; i < 32; i += 4) {
printf("%08x ", read32(addr + off + i));
}
printf("\n");
}
}
int snprintf(char *buffer, size_t size, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
i = vsnprintf(buffer, size, fmt, args);
va_end(args);
return i;
}
int debug_printf(const char *fmt, ...)
{
va_list args;
char buffer[512];
int i;
va_start(args, fmt);
i = vsnprintf(buffer, sizeof(buffer), fmt, args);
va_end(args);
iodev_console_write(buffer, min(i, (int)(sizeof(buffer) - 1)));
return i;
}
void __assert_fail(const char *assertion, const char *file, unsigned int line, const char *function)
{
printf("Assertion failed: '%s' on %s:%d:%s\n", assertion, file, line, function);
flush_and_reboot();
}
void udelay(u32 d)
{
u64 delay = ((u64)d) * mrs(CNTFRQ_EL0) / 1000000;
u64 val = mrs(CNTPCT_EL0);
while ((mrs(CNTPCT_EL0) - val) < delay)
;
sysop("isb");
}
u64 ticks_to_msecs(u64 ticks)
{
// NOTE: only accurate if freq is even kHz
return ticks / (mrs(CNTFRQ_EL0) / 1000);
}
u64 ticks_to_usecs(u64 ticks)
{
// NOTE: only accurate if freq is even MHz
return ticks / (mrs(CNTFRQ_EL0) / 1000000);
}
u64 timeout_calculate(u32 usec)
{
u64 delay = ((u64)usec) * mrs(CNTFRQ_EL0) / 1000000;
return mrs(CNTPCT_EL0) + delay;
}
bool timeout_expired(u64 timeout)
{
bool expired = mrs(CNTPCT_EL0) > timeout;
sysop("isb");
return expired;
}
void flush_and_reboot(void)
{
iodev_console_flush();
reboot();
}
void spin_init(spinlock_t *lock)
{
lock->lock = -1;
lock->count = 0;
}
void spin_lock(spinlock_t *lock)
{
s64 tmp;
s64 me = smp_id();
if (__atomic_load_n(&lock->lock, __ATOMIC_ACQUIRE) == me) {
lock->count++;
return;
}
__asm__ volatile("1:\n"
"mov\t%0, -1\n"
"2:\n"
"\tcasa\t%0, %2, %1\n"
"\tcmn\t%0, 1\n"
"\tbeq\t3f\n"
"\tldxr\t%0, %1\n"
"\tcmn\t%0, 1\n"
"\tbeq\t2b\n"
"\twfe\n"
"\tb\t1b\n"
"3:"
: "=&r"(tmp), "+m"(lock->lock)
: "r"(me)
: "cc", "memory");
assert(__atomic_load_n(&lock->lock, __ATOMIC_RELAXED) == me);
lock->count++;
}
void spin_unlock(spinlock_t *lock)
{
s64 me = smp_id();
assert(__atomic_load_n(&lock->lock, __ATOMIC_RELAXED) == me);
assert(lock->count > 0);
if (!--lock->count)
__atomic_store_n(&lock->lock, -1L, __ATOMIC_RELEASE);
}
bool is_heap(void *addr)
{
u64 p = (u64)addr;
u64 top_of_kernel_data = (u64)cur_boot_args.top_of_kernel_data;
u64 top_of_ram = cur_boot_args.mem_size + cur_boot_args.phys_base;
return p > top_of_kernel_data && p < top_of_ram;
}
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