#include <pexpert/arm64/board_config.h>
#include <arm64/proc_reg.h>
#endif
+#if HIBERNATION
+#include <machine/pal_hibernate.h>
+#endif /* HIBERNATION */
struct pe_serial_functions {
void (*uart_init) (void);
shmcon_init(void)
{
DTEntry entry;
- uintptr_t *reg_prop;
+ uintptr_t const *reg_prop;
volatile struct shm_buffer_info *end;
size_t i, header_size;
unsigned int size;
vm_offset_t pa_panic_base, panic_size, va_buffer_base, va_buffer_end;
- if (kSuccess != DTLookupEntry(0, "pram", &entry)) {
+ if (kSuccess != SecureDTLookupEntry(0, "pram", &entry)) {
return;
}
- if (kSuccess != DTGetProperty(entry, "reg", (void **)®_prop, &size)) {
+ if (kSuccess != SecureDTGetProperty(entry, "reg", (void const **)®_prop, &size)) {
return;
}
/*****************************************************************************/
-#ifdef DOCKFIFO_UART
-
-
-// Allow a 30ms stall of wall clock time before DockFIFO starts dropping characters
-#define DOCKFIFO_WR_MAX_STALL_US (30*1000)
-
-static uint64_t prev_dockfifo_drained_time; // Last time we've seen the DockFIFO drained by an external agent
-static uint64_t prev_dockfifo_spaces; // Previous w_stat level of the DockFIFO.
-static uint32_t dockfifo_capacity;
-static uint64_t dockfifo_stall_grace;
-
-static vm_offset_t dockfifo_uart_base = 0;
-
-//=======================
-// Local funtions
-//=======================
-
-static int
-dockfifo_drain_on_stall()
-{
- // Called when DockFIFO runs out of spaces.
- // Check if the DockFIFO reader has stalled. If so, empty the DockFIFO ourselves.
- // Return number of bytes drained.
-
- if (mach_absolute_time() - prev_dockfifo_drained_time >= dockfifo_stall_grace) {
- // It's been more than DOCKFIFO_WR_MAX_STALL_US and nobody read from the FIFO
- // Drop a character.
- (void)rDOCKFIFO_R_DATA(DOCKFIFO_UART_READ, 1);
- os_atomic_inc(&prev_dockfifo_spaces, relaxed);
- return 1;
- }
- return 0;
-}
-
-
-static int
-dockfifo_uart_tr0(void)
-{
- uint32_t spaces = rDOCKFIFO_W_STAT(DOCKFIFO_UART_WRITE) & 0xffff;
- if (spaces >= dockfifo_capacity || spaces > prev_dockfifo_spaces) {
- // More spaces showed up. That can only mean someone read the FIFO.
- // Note that if the DockFIFO is empty we cannot tell if someone is listening,
- // we can only give them the benefit of the doubt.
-
- prev_dockfifo_drained_time = mach_absolute_time();
- }
- prev_dockfifo_spaces = spaces;
-
- return spaces || dockfifo_drain_on_stall();
-}
-
-static void
-dockfifo_uart_td0(int c)
-{
- rDOCKFIFO_W_DATA(DOCKFIFO_UART_WRITE, 1) = (unsigned)(c & 0xff);
- os_atomic_dec(&prev_dockfifo_spaces, relaxed); // After writing a byte we have one fewer space than previously expected.
-}
-
-static int
-dockfifo_uart_rr0(void)
-{
- return rDOCKFIFO_R_DATA(DOCKFIFO_UART_READ, 0) & 0x7f;
-}
-
-static int
-dockfifo_uart_rd0(void)
-{
- return (int)((rDOCKFIFO_R_DATA(DOCKFIFO_UART_READ, 1) >> 8) & 0xff);
-}
-
-static void
-dockfifo_uart_init(void)
-{
- nanoseconds_to_absolutetime(DOCKFIFO_WR_MAX_STALL_US * 1000, &dockfifo_stall_grace);
-
- // Disable autodraining of the FIFO. We now purely manage it in software.
- rDOCKFIFO_DRAIN(DOCKFIFO_UART_WRITE) = 0;
-
- // Empty the DockFIFO by draining it until OCCUPANCY is 0, then measure its capacity
- while (rDOCKFIFO_R_DATA(DOCKFIFO_UART_WRITE, 3) & 0x7F) {
- ;
- }
- dockfifo_capacity = rDOCKFIFO_W_STAT(DOCKFIFO_UART_WRITE) & 0xffff;
-}
-
-SECURITY_READ_ONLY_LATE(static struct pe_serial_functions) dockfifo_uart_serial_functions =
-{
- .uart_init = dockfifo_uart_init,
- .uart_set_baud_rate = NULL,
- .tr0 = dockfifo_uart_tr0,
- .td0 = dockfifo_uart_td0,
- .rr0 = dockfifo_uart_rr0,
- .rd0 = dockfifo_uart_rd0
-};
-
-#endif /* DOCKFIFO_UART */
-
-/*****************************************************************************/
-
#ifdef DOCKCHANNEL_UART
#define DOCKCHANNEL_WR_MAX_STALL_US (30*1000)
static vm_offset_t dock_agent_base;
static uint32_t max_dockchannel_drain_period;
static bool use_sw_drain;
+static uint32_t dock_wstat_mask;
static uint64_t prev_dockchannel_drained_time; // Last time we've seen the DockChannel drained by an external agent
static uint64_t prev_dockchannel_spaces; // Previous w_stat level of the DockChannel.
static uint64_t dockchannel_stall_grace;
if ((mach_absolute_time() - prev_dockchannel_drained_time) >= dockchannel_stall_grace) {
// It's been more than DOCKCHANEL_WR_MAX_STALL_US and nobody read from the FIFO
// Drop a character.
- (void)rDOCKCHANNELS_DEV_RDATA1(DOCKCHANNEL_UART_CHANNEL);
+ (void)rDOCKCHANNELS_DOCK_RDATA1(DOCKCHANNEL_UART_CHANNEL);
os_atomic_inc(&prev_dockchannel_spaces, relaxed);
return 1;
}
dockchannel_uart_tr0(void)
{
if (use_sw_drain) {
- uint32_t spaces = rDOCKCHANNELS_DEV_WSTAT(DOCKCHANNEL_UART_CHANNEL) & 0x1ff;
+ uint32_t spaces = rDOCKCHANNELS_DEV_WSTAT(DOCKCHANNEL_UART_CHANNEL) & dock_wstat_mask;
if (spaces > prev_dockchannel_spaces) {
// More spaces showed up. That can only mean someone read the FIFO.
// Note that if the DockFIFO is empty we cannot tell if someone is listening,
return spaces || dockchannel_drain_on_stall();
} else {
// Returns spaces in dockchannel fifo
- return rDOCKCHANNELS_DEV_WSTAT(DOCKCHANNEL_UART_CHANNEL) & 0x1ff;
+ return rDOCKCHANNELS_DEV_WSTAT(DOCKCHANNEL_UART_CHANNEL) & dock_wstat_mask;
}
}
BCM2837_PUT32(BCM2837_AUX_MU_IIR_REG_V, 0xC6);
BCM2837_PUT32(BCM2837_AUX_MU_BAUD_REG_V, 270);
- i = BCM2837_FSEL_REG(14);
+ i = (uint32_t)BCM2837_FSEL_REG(14);
// Configure GPIOs 14 & 15 for alternate function 5
i &= ~(BCM2837_FSEL_MASK(14));
i |= (BCM2837_FSEL_ALT5 << BCM2837_FSEL_OFFS(14));
DTEntry entryP = NULL;
uint32_t prop_size;
vm_offset_t soc_base;
- uintptr_t *reg_prop;
- uint32_t *prop_value __unused = NULL;
- char *serial_compat __unused = 0;
+ uintptr_t const *reg_prop;
+ uint32_t const *prop_value __unused = NULL;
+ char const *serial_compat __unused = 0;
uint32_t dccmode;
struct pe_serial_functions *fns = gPESF;
}
#ifdef PI3_UART
- if (DTFindEntry("name", "gpio", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ if (SecureDTFindEntry("name", "gpio", &entryP) == kSuccess) {
+ SecureDTGetProperty(entryP, "reg", (void const **)®_prop, &prop_size);
pi3_gpio_base_vaddr = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
}
- if (DTFindEntry("name", "aux", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ if (SecureDTFindEntry("name", "aux", &entryP) == kSuccess) {
+ SecureDTGetProperty(entryP, "reg", (void const **)®_prop, &prop_size);
pi3_aux_base_vaddr = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
}
if ((pi3_gpio_base_vaddr != 0) && (pi3_aux_base_vaddr != 0)) {
}
#endif /* PI3_UART */
-#ifdef DOCKFIFO_UART
- uint32_t no_dockfifo_uart = 0;
- PE_parse_boot_argn("no-dockfifo-uart", &no_dockfifo_uart, sizeof(no_dockfifo_uart));
- if (no_dockfifo_uart == 0) {
- if (DTFindEntry("name", "dockfifo-uart", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
- dockfifo_uart_base = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
- register_serial_functions(&dockfifo_uart_serial_functions);
- }
- }
-#endif /* DOCKFIFO_UART */
-
#ifdef DOCKCHANNEL_UART
uint32_t no_dockchannel_uart = 0;
- if (DTFindEntry("name", "dockchannel-uart", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ if (SecureDTFindEntry("name", "dockchannel-uart", &entryP) == kSuccess) {
+ SecureDTGetProperty(entryP, "reg", (void const **)®_prop, &prop_size);
// Should be two reg entries
if (prop_size / sizeof(uintptr_t) != 4) {
panic("Malformed dockchannel-uart property");
// Keep the old name for boot-arg
if (no_dockchannel_uart == 0) {
register_serial_functions(&dockchannel_uart_serial_functions);
- DTGetProperty(entryP, "max-aop-clk", (void **)&prop_value, &prop_size);
+ SecureDTGetProperty(entryP, "max-aop-clk", (void const **)&prop_value, &prop_size);
max_dockchannel_drain_period = (uint32_t)((prop_value)? (*prop_value * 0.03) : DOCKCHANNEL_DRAIN_PERIOD);
- DTGetProperty(entryP, "enable-sw-drain", (void **)&prop_value, &prop_size);
+ prop_value = NULL;
+ SecureDTGetProperty(entryP, "enable-sw-drain", (void const **)&prop_value, &prop_size);
use_sw_drain = (prop_value)? *prop_value : 0;
+ prop_value = NULL;
+ SecureDTGetProperty(entryP, "dock-wstat-mask", (void const **)&prop_value, &prop_size);
+ dock_wstat_mask = (prop_value)? *prop_value : 0x1ff;
} else {
dockchannel_uart_clear_intr();
}
* If we don't find it there, look for "uart0" and "uart1".
*/
- if (DTFindEntry("boot-console", NULL, &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ if (SecureDTFindEntry("boot-console", NULL, &entryP) == kSuccess) {
+ SecureDTGetProperty(entryP, "reg", (void const **)®_prop, &prop_size);
uart_base = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
if (serial_compat == 0) {
- DTGetProperty(entryP, "compatible", (void **)&serial_compat, &prop_size);
+ SecureDTGetProperty(entryP, "compatible", (void const **)&serial_compat, &prop_size);
}
- } else if (DTFindEntry("name", "uart0", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ } else if (SecureDTFindEntry("name", "uart0", &entryP) == kSuccess) {
+ SecureDTGetProperty(entryP, "reg", (void const **)®_prop, &prop_size);
uart_base = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
if (serial_compat == 0) {
- DTGetProperty(entryP, "compatible", (void **)&serial_compat, &prop_size);
+ SecureDTGetProperty(entryP, "compatible", (void const **)&serial_compat, &prop_size);
}
- } else if (DTFindEntry("name", "uart1", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ } else if (SecureDTFindEntry("name", "uart1", &entryP) == kSuccess) {
+ SecureDTGetProperty(entryP, "reg", (void const **)®_prop, &prop_size);
uart_base = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
if (serial_compat == 0) {
- DTGetProperty(entryP, "compatible", (void **)&serial_compat, &prop_size);
+ SecureDTGetProperty(entryP, "compatible", (void const **)&serial_compat, &prop_size);
}
}
#ifdef S3CUART
if (NULL != entryP) {
- DTGetProperty(entryP, "pclk", (void **)&prop_value, &prop_size);
+ SecureDTGetProperty(entryP, "pclk", (void const **)&prop_value, &prop_size);
if (prop_value) {
dt_pclk = *prop_value;
}
prop_value = NULL;
- DTGetProperty(entryP, "sampling", (void **)&prop_value, &prop_size);
+ SecureDTGetProperty(entryP, "sampling", (void const **)&prop_value, &prop_size);
if (prop_value) {
dt_sampling = *prop_value;
}
prop_value = NULL;
- DTGetProperty(entryP, "ubrdiv", (void **)&prop_value, &prop_size);
+ SecureDTGetProperty(entryP, "ubrdiv", (void const **)&prop_value, &prop_size);
if (prop_value) {
dt_ubrdiv = *prop_value;
}
}
- if (!strcmp(serial_compat, "uart,16550")) {
- register_serial_functions(&ln2410_serial_functions);
- } else if (!strcmp(serial_compat, "uart-16550")) {
- register_serial_functions(&ln2410_serial_functions);
- } else if (!strcmp(serial_compat, "uart,s5i3000")) {
- register_serial_functions(&ln2410_serial_functions);
- } else if (!strcmp(serial_compat, "uart-1,samsung")) {
- register_serial_functions(&ln2410_serial_functions);
+
+ if (serial_compat) {
+ if (!strcmp(serial_compat, "uart,16550")) {
+ register_serial_functions(&ln2410_serial_functions);
+ } else if (!strcmp(serial_compat, "uart-16550")) {
+ register_serial_functions(&ln2410_serial_functions);
+ } else if (!strcmp(serial_compat, "uart,s5i3000")) {
+ register_serial_functions(&ln2410_serial_functions);
+ } else if (!strcmp(serial_compat, "uart-1,samsung")) {
+ register_serial_functions(&ln2410_serial_functions);
+ }
}
#endif /* S3CUART */
fns = fns->next;
}
+#if HIBERNATION
+ /* hibernation needs to know the UART register addresses since it can't directly use this serial driver */
+ if (dockchannel_uart_base) {
+ gHibernateGlobals.dockChannelRegBase = ml_vtophys(dockchannel_uart_base);
+ gHibernateGlobals.dockChannelWstatMask = dock_wstat_mask;
+ }
+ if (uart_base) {
+ gHibernateGlobals.hibUartRegBase = ml_vtophys(uart_base);
+ }
+#endif /* HIBERNATION */
+
uart_initted = 1;
return 1;
struct pe_serial_functions *fns = gPESF;
while (fns != NULL) {
while (!fns->tr0()) {
+#if __arm64__ /* on arm64, we have a WFE timeout, so no need to hot-poll here */
+ __builtin_arm_wfe()
+#endif
; /* Wait until THR is empty. */
}
fns->td0(c);
projects / apple / xnu.git / blobdiff