#include <kern/clock.h>
#include <kern/debug.h>
#include <libkern/OSBase.h>
+#include <libkern/section_keywords.h>
#include <mach/mach_time.h>
+#include <machine/atomic.h>
#include <machine/machine_routines.h>
#include <pexpert/pexpert.h>
#include <pexpert/protos.h>
#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);
void (*td0) (int c);
int (*rr0) (void);
int (*rd0) (void);
+ struct pe_serial_functions *next;
};
-static struct pe_serial_functions *gPESF;
-
-static int uart_initted = 0; /* 1 if init'ed */
-
-static vm_offset_t uart_base;
+SECURITY_READ_ONLY_LATE(static struct pe_serial_functions*) gPESF = NULL;
+static int uart_initted = 0; /* 1 if init'ed */
+static vm_offset_t uart_base = 0;
/*****************************************************************************/
-#ifdef S3CUART
+#ifdef S3CUART
static int32_t dt_pclk = -1;
static int32_t dt_sampling = -1;
static int32_t dt_ubrdiv = -1;
+static void ln2410_uart_set_baud_rate(__unused int unit, uint32_t baud_rate);
+
static void
ln2410_uart_init(void)
{
- uint32_t ucon0 = 0x405; /* NCLK, No interrupts, No DMA - just polled */
+ uint32_t ucon0 = 0x405; /* NCLK, No interrupts, No DMA - just polled */
- rULCON0 = 0x03; /* 81N, not IR */
+ rULCON0 = 0x03; /* 81N, not IR */
// Override with pclk dt entry
- if (dt_pclk != -1)
+ if (dt_pclk != -1) {
ucon0 = ucon0 & ~0x400;
+ }
rUCON0 = ucon0;
- rUMCON0 = 0x00; /* Clear Flow Control */
+ rUMCON0 = 0x00; /* Clear Flow Control */
- gPESF->uart_set_baud_rate(0, 115200);
+ ln2410_uart_set_baud_rate(0, 115200);
- rUFCON0 = 0x03; /* Clear & Enable FIFOs */
- rUMCON0 = 0x01; /* Assert RTS on UART0 */
+ rUFCON0 = 0x03; /* Clear & Enable FIFOs */
+ rUMCON0 = 0x01; /* Assert RTS on UART0 */
}
static void
uint32_t div = 0;
uint32_t uart_clock = 0;
uint32_t sample_rate = 16;
-
- if (baud_rate < 300)
+
+ if (baud_rate < 300) {
baud_rate = 9600;
+ }
- if (rUCON0 & 0x400)
+ if (rUCON0 & 0x400) {
// NCLK
uart_clock = (uint32_t)gPEClockFrequencyInfo.fix_frequency_hz;
- else
- // PCLK
+ } else {
+ // PCLK
uart_clock = (uint32_t)gPEClockFrequencyInfo.prf_frequency_hz;
+ }
if (dt_sampling != -1) {
// Use the sampling rate specified in the Device Tree
sample_rate = dt_sampling & 0xf;
}
-
+
if (dt_ubrdiv != -1) {
// Use the ubrdiv specified in the Device Tree
div = dt_ubrdiv & 0xffff;
} else {
// Calculate ubrdiv. UBRDIV = (SourceClock / (BPS * Sample Rate)) - 1
div = uart_clock / (baud_rate * sample_rate);
-
+
uint32_t actual_baud = uart_clock / ((div + 0) * sample_rate);
uint32_t baud_low = uart_clock / ((div + 1) * sample_rate);
// Adjust div to get the closest target baudrate
- if ((baud_rate - baud_low) > (actual_baud - baud_rate))
+ if ((baud_rate - baud_low) > (actual_baud - baud_rate)) {
div--;
+ }
}
// Sample Rate [19:16], UBRDIV [15:0]
return (int)rURXH0;
}
-static struct pe_serial_functions ln2410_serial_functions = {
- ln2410_uart_init, ln2410_uart_set_baud_rate,
-ln2410_tr0, ln2410_td0, ln2410_rr0, ln2410_rd0};
+SECURITY_READ_ONLY_LATE(static struct pe_serial_functions) ln2410_serial_functions =
+{
+ .uart_init = ln2410_uart_init,
+ .uart_set_baud_rate = ln2410_uart_set_baud_rate,
+ .tr0 = ln2410_tr0,
+ .td0 = ln2410_td0,
+ .rr0 = ln2410_rr0,
+ .rd0 = ln2410_rd0
+};
-#endif /* S3CUART */
+#endif /* S3CUART */
/*****************************************************************************/
+static void
+dcc_uart_init(void)
+{
+}
static unsigned int
read_dtr(void)
{
#ifdef __arm__
- unsigned int c;
- __asm__ volatile(
- "mrc p14, 0, %0, c0, c5\n"
-: "=r"(c));
+ unsigned int c;
+ __asm__ volatile (
+ "mrc p14, 0, %0, c0, c5\n"
+ : "=r"(c));
return c;
#else
/* ARM64_TODO */
write_dtr(unsigned int c)
{
#ifdef __arm__
- __asm__ volatile(
- "mcr p14, 0, %0, c0, c5\n"
- :
- :"r"(c));
+ __asm__ volatile (
+ "mcr p14, 0, %0, c0, c5\n"
+ :
+ :"r"(c));
#else
/* ARM64_TODO */
(void)c;
return read_dtr();
}
-static struct pe_serial_functions dcc_serial_functions = {
- NULL, NULL,
-dcc_tr0, dcc_td0, dcc_rr0, dcc_rd0};
+SECURITY_READ_ONLY_LATE(static struct pe_serial_functions) dcc_serial_functions =
+{
+ .uart_init = dcc_uart_init,
+ .uart_set_baud_rate = NULL,
+ .tr0 = dcc_tr0,
+ .td0 = dcc_td0,
+ .rr0 = dcc_rr0,
+ .rd0 = dcc_rd0
+};
/*****************************************************************************/
#ifdef SHMCON
-#define CPU_CACHELINE_SIZE (1 << MMU_CLINE)
+#define CPU_CACHELINE_SIZE (1 << MMU_CLINE)
#ifndef SHMCON_NAME
-#define SHMCON_NAME "AP-xnu"
+#define SHMCON_NAME "AP-xnu"
#endif
-#define SHMCON_MAGIC 'SHMC'
-#define SHMCON_VERSION 2
-#define CBUF_IN 0
-#define CBUF_OUT 1
-#define INBUF_SIZE (panic_size / 16)
-#define FULL_ALIGNMENT (64)
+#define SHMCON_MAGIC 'SHMC'
+#define SHMCON_VERSION 2
+#define CBUF_IN 0
+#define CBUF_OUT 1
+#define INBUF_SIZE (panic_size / 16)
+#define FULL_ALIGNMENT (64)
-#define FLAG_CACHELINE_32 1
-#define FLAG_CACHELINE_64 2
+#define FLAG_CACHELINE_32 1
+#define FLAG_CACHELINE_64 2
/* Defines to clarify the master/slave fields' use as circular buffer pointers */
-#define head_in sidx[CBUF_IN]
-#define tail_in midx[CBUF_IN]
-#define head_out midx[CBUF_OUT]
-#define tail_out sidx[CBUF_OUT]
+#define head_in sidx[CBUF_IN]
+#define tail_in midx[CBUF_IN]
+#define head_out midx[CBUF_OUT]
+#define tail_out sidx[CBUF_OUT]
/* TODO: get from device tree/target */
-#define NUM_CHILDREN 5
+#define NUM_CHILDREN 5
#define WRAP_INCR(len, x) do{ (x)++; if((x) >= (len)) (x) = 0; } while(0)
#define ROUNDUP(a, b) (((a) + ((b) - 1)) & (~((b) - 1)))
-#define MAX(a,b) ((a) > (b) ? (a) : (b))
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define shmcon_barrier() do {__asm__ volatile("dmb ish" : : : "memory");} while(0)
struct shm_buffer_info {
- uint64_t base;
- uint32_t unused;
- uint32_t magic;
+ uint64_t base;
+ uint32_t unused;
+ uint32_t magic;
};
struct shmcon_header {
- uint32_t magic;
- uint8_t version;
- uint8_t children; /* number of child entries in child_ent */
- uint16_t flags;
- uint64_t buf_paddr[2]; /* Physical address for buffers (in, out) */
- uint32_t buf_len[2];
- uint8_t name[8];
+ uint32_t magic;
+ uint8_t version;
+ uint8_t children; /* number of child entries in child_ent */
+ uint16_t flags;
+ uint64_t buf_paddr[2]; /* Physical address for buffers (in, out) */
+ uint32_t buf_len[2];
+ uint8_t name[8];
/* Slave-modified data - invalidate before read */
- uint32_t sidx[2] __attribute__((aligned (FULL_ALIGNMENT))); /* In head, out tail */
+ uint32_t sidx[2] __attribute__((aligned(FULL_ALIGNMENT))); /* In head, out tail */
/* Master-modified data - clean after write */
- uint32_t midx[2] __attribute__((aligned (FULL_ALIGNMENT))); /* In tail, out head */
+ uint32_t midx[2] __attribute__((aligned(FULL_ALIGNMENT))); /* In tail, out head */
- uint64_t child[0]; /* Physical address of child header pointers */
+ uint64_t child[0]; /* Physical address of child header pointers */
};
static volatile struct shmcon_header *shmcon = NULL;
static uint64_t full_timeout = 0;
#endif
-static void shmcon_set_baud_rate(__unused int unit, __unused uint32_t baud_rate)
+static void
+shmcon_set_baud_rate(__unused int unit, __unused uint32_t baud_rate)
{
return;
}
-static int shmcon_tr0(void)
+static int
+shmcon_tr0(void)
{
#ifdef SHMCON_THROTTLED
uint32_t head = shmcon->head_out;
full_timeout = mach_absolute_time() + grace;
return 0;
}
- if (full_timeout > mach_absolute_time())
+ if (full_timeout > mach_absolute_time()) {
return 0;
+ }
/* Timeout - slave not really there or not keeping up */
tail += (len / 4);
- if (tail >= len)
+ if (tail >= len) {
tail -= len;
+ }
shmcon_barrier();
shmcon->tail_out = tail;
full_timeout = 0;
return 1;
}
-static void shmcon_td0(int c)
+static void
+shmcon_td0(int c)
{
uint32_t head = shmcon->head_out;
uint32_t len = shmcon->buf_len[CBUF_OUT];
shmcon->head_out = head;
}
-static int shmcon_rr0(void)
+static int
+shmcon_rr0(void)
{
- if (shmcon->tail_in == shmcon->head_in)
+ if (shmcon->tail_in == shmcon->head_in) {
return 0;
+ }
return 1;
}
-static int shmcon_rd0(void)
+static int
+shmcon_rd0(void)
{
int c;
uint32_t tail = shmcon->tail_in;
return c;
}
-static void shmcon_init(void)
+static void
+shmcon_init(void)
{
- DTEntry entry;
- uintptr_t *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;
+ DTEntry entry;
+ 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;
+ }
pa_panic_base = reg_prop[0];
panic_size = reg_prop[1];
len = shmcon->buf_len[i];
/* Validate buffers */
if ((pa_buf < pa_buffer_base) ||
- (pa_buf >= pa_buffer_end) ||
- ((pa_buf + len) > pa_buffer_end) ||
- (shmcon->midx[i] >= len) || /* Index out of bounds */
- (shmcon->sidx[i] >= len) ||
- (pa_buf != ROUNDUP(pa_buf, CPU_CACHELINE_SIZE)) || /* Unaligned pa_buffer */
- (len < 1024) ||
- (len > (pa_buffer_end - pa_buffer_base)) ||
- (shmcon->children != NUM_CHILDREN))
+ (pa_buf >= pa_buffer_end) ||
+ ((pa_buf + len) > pa_buffer_end) ||
+ (shmcon->midx[i] >= len) || /* Index out of bounds */
+ (shmcon->sidx[i] >= len) ||
+ (pa_buf != ROUNDUP(pa_buf, CPU_CACHELINE_SIZE)) || /* Unaligned pa_buffer */
+ (len < 1024) ||
+ (len > (pa_buffer_end - pa_buffer_base)) ||
+ (shmcon->children != NUM_CHILDREN)) {
goto validation_failure;
+ }
/* Compute the VA offset of the buffer */
shmbuf[i] = (uint8_t *)(uintptr_t)shmcon + ((uintptr_t)pa_buf - (uintptr_t)pa_panic_base);
}
/* Check that buffers don't overlap */
if ((uintptr_t)shmbuf[0] < (uintptr_t)shmbuf[1]) {
- if ((uintptr_t)(shmbuf[0] + shmcon->buf_len[0]) > (uintptr_t)shmbuf[1])
+ if ((uintptr_t)(shmbuf[0] + shmcon->buf_len[0]) > (uintptr_t)shmbuf[1]) {
goto validation_failure;
+ }
} else {
- if ((uintptr_t)(shmbuf[1] + shmcon->buf_len[1]) > (uintptr_t)shmbuf[0])
+ if ((uintptr_t)(shmbuf[1] + shmcon->buf_len[1]) > (uintptr_t)shmbuf[0]) {
goto validation_failure;
+ }
}
shmcon->tail_in = shmcon->head_in; /* Clear input buffer */
shmcon_barrier();
memset((void *)shmcon->name, ' ', sizeof(shmcon->name));
memcpy((void *)shmcon->name, SHMCON_NAME, MIN(sizeof(shmcon->name), strlen(SHMCON_NAME)));
#pragma clang diagnostic pop
- for (i = 0; i < NUM_CHILDREN; i++)
+ for (i = 0; i < NUM_CHILDREN; i++) {
shmcon->child[0] = 0;
+ }
shmcon_barrier();
shmcon->magic = SHMCON_MAGIC;
}
PE_consistent_debug_register(kDbgIdConsoleHeaderAP, pa_panic_base, panic_size);
}
-static struct pe_serial_functions shmcon_serial_functions =
+SECURITY_READ_ONLY_LATE(static struct pe_serial_functions) shmcon_serial_functions =
{
.uart_init = shmcon_init,
.uart_set_baud_rate = shmcon_set_baud_rate,
.rd0 = shmcon_rd0
};
-int pe_shmcon_set_child(uint64_t paddr, uint32_t entry)
+int
+pe_shmcon_set_child(uint64_t paddr, uint32_t entry)
{
- if (shmcon == NULL)
+ if (shmcon == NULL) {
return -1;
+ }
- if (shmcon->children >= entry)
+ if (shmcon->children >= entry) {
return -1;
+ }
shmcon->child[entry] = paddr;
return 0;
/*****************************************************************************/
-#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;
-
-
-//=======================
-// 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);
- prev_dockfifo_spaces++;
- 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);
- prev_dockfifo_spaces--; // 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;
-}
-
-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)
+#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 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;
+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;
+static vm_offset_t dockchannel_uart_base = 0;
//=======================
// Local funtions
//=======================
-static int dockchannel_drain_on_stall()
+static int
+dockchannel_drain_on_stall()
{
// Called when DockChannel runs out of spaces.
// Check if the DockChannel reader has stalled. If so, empty the DockChannel ourselves.
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);
- prev_dockchannel_spaces++;
+ (void)rDOCKCHANNELS_DOCK_RDATA1(DOCKCHANNEL_UART_CHANNEL);
+ os_atomic_inc(&prev_dockchannel_spaces, relaxed);
return 1;
}
return 0;
}
-static int dockchannel_uart_tr0(void)
+static int
+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;
}
}
-static void dockchannel_uart_td0(int c)
+static void
+dockchannel_uart_td0(int c)
{
rDOCKCHANNELS_DEV_WDATA1(DOCKCHANNEL_UART_CHANNEL) = (unsigned)(c & 0xff);
if (use_sw_drain) {
- prev_dockchannel_spaces--; // After writing a byte we have one fewer space than previously expected.
+ os_atomic_dec(&prev_dockchannel_spaces, relaxed); // After writing a byte we have one fewer space than previously expected.
}
}
-static int dockchannel_uart_rr0(void)
+static int
+dockchannel_uart_rr0(void)
{
return rDOCKCHANNELS_DEV_RDATA0(DOCKCHANNEL_UART_CHANNEL) & 0x7f;
}
-static int dockchannel_uart_rd0(void)
+static int
+dockchannel_uart_rd0(void)
{
- return (int)((rDOCKCHANNELS_DEV_RDATA1(DOCKCHANNEL_UART_CHANNEL)>> 8) & 0xff);
+ return (int)((rDOCKCHANNELS_DEV_RDATA1(DOCKCHANNEL_UART_CHANNEL) >> 8) & 0xff);
}
-static void dockchannel_uart_init(void)
+static void
+dockchannel_uart_clear_intr(void)
+{
+ rDOCKCHANNELS_AGENT_AP_INTR_CTRL &= ~(0x3);
+ rDOCKCHANNELS_AGENT_AP_INTR_STATUS |= 0x3;
+ rDOCKCHANNELS_AGENT_AP_ERR_INTR_CTRL &= ~(0x3);
+ rDOCKCHANNELS_AGENT_AP_ERR_INTR_STATUS |= 0x3;
+}
+
+static void
+dockchannel_uart_init(void)
{
if (use_sw_drain) {
nanoseconds_to_absolutetime(DOCKCHANNEL_WR_MAX_STALL_US * NSEC_PER_USEC, &dockchannel_stall_grace);
}
// Clear all interrupt enable and status bits
- rDOCKCHANNELS_AGENT_AP_INTR_CTRL &= ~(0x3);
- rDOCKCHANNELS_AGENT_AP_INTR_STATUS |= 0x3;
- rDOCKCHANNELS_AGENT_AP_ERR_INTR_CTRL &= ~(0x3);
- rDOCKCHANNELS_AGENT_AP_ERR_INTR_STATUS |= 0x3;
+ dockchannel_uart_clear_intr();
// Setup DRAIN timer
rDOCKCHANNELS_DEV_DRAIN_CFG(DOCKCHANNEL_UART_CHANNEL) = max_dockchannel_drain_period;
- // Drain timer doesnt get loaded with value from drain period register if fifo
- // is already full. Drop a character from the fifo.
- // Refer https://seg-docs.ecs.apple.com/projects/cayman//release/specs/Apple/DockChannels/DockChannels_Specification.pdf
- // Chapter 8 for more details.
+ // Drain timer doesn't get loaded with value from drain period register if fifo
+ // is already full. Drop a character from the fifo.
rDOCKCHANNELS_DOCK_RDATA1(DOCKCHANNEL_UART_CHANNEL);
}
-static struct pe_serial_functions dockchannel_uart_serial_functions =
+SECURITY_READ_ONLY_LATE(static struct pe_serial_functions) dockchannel_uart_serial_functions =
{
.uart_init = dockchannel_uart_init,
.uart_set_baud_rate = NULL,
#endif /* DOCKCHANNEL_UART */
+/****************************************************************************/
+#ifdef PI3_UART
+vm_offset_t pi3_gpio_base_vaddr = 0;
+vm_offset_t pi3_aux_base_vaddr = 0;
+static int
+pi3_uart_tr0(void)
+{
+ return (int) BCM2837_GET32(BCM2837_AUX_MU_LSR_REG_V) & 0x20;
+}
+
+static void
+pi3_uart_td0(int c)
+{
+ BCM2837_PUT32(BCM2837_AUX_MU_IO_REG_V, (uint32_t) c);
+}
+
+static int
+pi3_uart_rr0(void)
+{
+ return (int) BCM2837_GET32(BCM2837_AUX_MU_LSR_REG_V) & 0x01;
+}
+
+static int
+pi3_uart_rd0(void)
+{
+ return (int) BCM2837_GET32(BCM2837_AUX_MU_IO_REG_V) & 0xff;
+}
+
+static void
+pi3_uart_init(void)
+{
+ // Scratch variable
+ uint32_t i;
+
+ // Reset mini uart registers
+ BCM2837_PUT32(BCM2837_AUX_ENABLES_V, 1);
+ BCM2837_PUT32(BCM2837_AUX_MU_CNTL_REG_V, 0);
+ BCM2837_PUT32(BCM2837_AUX_MU_LCR_REG_V, 3);
+ BCM2837_PUT32(BCM2837_AUX_MU_MCR_REG_V, 0);
+ BCM2837_PUT32(BCM2837_AUX_MU_IER_REG_V, 0);
+ BCM2837_PUT32(BCM2837_AUX_MU_IIR_REG_V, 0xC6);
+ BCM2837_PUT32(BCM2837_AUX_MU_BAUD_REG_V, 270);
+
+ 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));
+ i &= ~(BCM2837_FSEL_MASK(15));
+ i |= (BCM2837_FSEL_ALT5 << BCM2837_FSEL_OFFS(15));
+
+ BCM2837_PUT32(BCM2837_FSEL_REG(14), i);
+
+ BCM2837_PUT32(BCM2837_GPPUD_V, 0);
+
+ // Barrier before AP spinning for 150 cycles
+ __builtin_arm_isb(ISB_SY);
+
+ for (i = 0; i < 150; i++) {
+ asm volatile ("add x0, x0, xzr");
+ }
+
+ __builtin_arm_isb(ISB_SY);
+
+ BCM2837_PUT32(BCM2837_GPPUDCLK0_V, (1 << 14) | (1 << 15));
+
+ __builtin_arm_isb(ISB_SY);
+
+ for (i = 0; i < 150; i++) {
+ asm volatile ("add x0, x0, xzr");
+ }
+
+ __builtin_arm_isb(ISB_SY);
+
+ BCM2837_PUT32(BCM2837_GPPUDCLK0_V, 0);
+
+ BCM2837_PUT32(BCM2837_AUX_MU_CNTL_REG_V, 3);
+}
+
+SECURITY_READ_ONLY_LATE(static struct pe_serial_functions) pi3_uart_serial_functions =
+{
+ .uart_init = pi3_uart_init,
+ .uart_set_baud_rate = NULL,
+ .tr0 = pi3_uart_tr0,
+ .td0 = pi3_uart_td0,
+ .rr0 = pi3_uart_rr0,
+ .rd0 = pi3_uart_rd0
+};
+
+#endif /* PI3_UART */
/*****************************************************************************/
+static void
+register_serial_functions(struct pe_serial_functions *fns)
+{
+ fns->next = gPESF;
+ gPESF = fns;
+}
+
int
serial_init(void)
{
- DTEntry entryP = NULL;
- uint32_t prop_size, dccmode;
- vm_offset_t soc_base;
- uintptr_t *reg_prop;
- uint32_t *prop_value = NULL;
- char *serial_compat = 0;
-#ifdef SHMCON
- uint32_t jconmode;
-#endif
-#ifdef DOCKFIFO_UART
- uint32_t no_dockfifo_uart;
-#endif
-#ifdef DOCKCHANNEL_UART
- uint32_t no_dockchannel_uart;
-#endif
+ DTEntry entryP = NULL;
+ uint32_t prop_size;
+ vm_offset_t soc_base;
+ 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;
if (uart_initted) {
- gPESF->uart_init();
+ while (fns != NULL) {
+ fns->uart_init();
+ fns = fns->next;
+ }
kprintf("reinit serial\n");
return 1;
}
+
dccmode = 0;
- if (PE_parse_boot_argn("dcc", &dccmode, sizeof (dccmode))) {
- gPESF = &dcc_serial_functions;
- uart_initted = 1;
- return 1;
+ if (PE_parse_boot_argn("dcc", &dccmode, sizeof(dccmode))) {
+ register_serial_functions(&dcc_serial_functions);
}
#ifdef SHMCON
- jconmode = 0;
+ uint32_t jconmode = 0;
if (PE_parse_boot_argn("jcon", &jconmode, sizeof jconmode)) {
- gPESF = &shmcon_serial_functions;
- gPESF->uart_init();
- uart_initted = 1;
- return 1;
+ register_serial_functions(&shmcon_serial_functions);
}
#endif /* SHMCON */
soc_base = pe_arm_get_soc_base_phys();
- if (soc_base == 0)
+ if (soc_base == 0) {
return 0;
+ }
-#ifdef DOCKFIFO_UART
- 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);
- uart_base = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
- }
- else {
- return 0;
- }
- gPESF = &dockfifo_uart_serial_functions;
- gPESF->uart_init();
- uart_initted = 1;
- return 1;
+#ifdef PI3_UART
+ 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 (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)) {
+ register_serial_functions(&pi3_uart_serial_functions);
}
-#endif /* DOCKFIFO_UART */
+#endif /* PI3_UART */
#ifdef DOCKCHANNEL_UART
- no_dockchannel_uart = 0;
- // Keep the old name for boot-arg
- PE_parse_boot_argn("no-dockfifo-uart", &no_dockchannel_uart, sizeof(no_dockchannel_uart));
- if (no_dockchannel_uart == 0) {
- if (DTFindEntry("name", "dockchannel-uart", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
- // Should be two reg entries
- if (prop_size/sizeof(uintptr_t) != 4)
- panic("Malformed dockchannel-uart property");
- uart_base = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
- dock_agent_base = ml_io_map(soc_base + *(reg_prop + 2), *(reg_prop + 3));
- gPESF = &dockchannel_uart_serial_functions;
- DTGetProperty(entryP, "max-aop-clk", (void **)&prop_value, &prop_size);
+ uint32_t no_dockchannel_uart = 0;
+ 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");
+ }
+ dockchannel_uart_base = ml_io_map(soc_base + *reg_prop, *(reg_prop + 1));
+ dock_agent_base = ml_io_map(soc_base + *(reg_prop + 2), *(reg_prop + 3));
+ PE_parse_boot_argn("no-dockfifo-uart", &no_dockchannel_uart, sizeof(no_dockchannel_uart));
+ // Keep the old name for boot-arg
+ if (no_dockchannel_uart == 0) {
+ register_serial_functions(&dockchannel_uart_serial_functions);
+ 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;
- gPESF->uart_init();
- uart_initted = 1;
- return 1;
+ 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 no dockchannel-uart is found in the device tree, fall back
// to looking for the traditional UART serial console.
}
+
#endif /* DOCKCHANNEL_UART */
/*
* 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);
- } else if (DTFindEntry("name", "uart0", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ if (serial_compat == 0) {
+ SecureDTGetProperty(entryP, "compatible", (void const **)&serial_compat, &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);
- } else if (DTFindEntry("name", "uart1", &entryP) == kSuccess) {
- DTGetProperty(entryP, "reg", (void **)®_prop, &prop_size);
+ if (serial_compat == 0) {
+ SecureDTGetProperty(entryP, "compatible", (void const **)&serial_compat, &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);
+ if (serial_compat == 0) {
+ SecureDTGetProperty(entryP, "compatible", (void const **)&serial_compat, &prop_size);
+ }
}
-#ifdef S3CUART
+#ifdef S3CUART
if (NULL != entryP) {
- DTGetProperty(entryP, "pclk", (void **)&prop_value, &prop_size);
- if (prop_value) dt_pclk = *prop_value;
+ 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);
- if (prop_value) dt_sampling = *prop_value;
+ 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);
- if (prop_value) dt_ubrdiv = *prop_value;
- }
- if (!strcmp(serial_compat, "uart,16550"))
- gPESF = &ln2410_serial_functions;
- else if (!strcmp(serial_compat, "uart-16550"))
- gPESF = &ln2410_serial_functions;
- else if (!strcmp(serial_compat, "uart,s5i3000"))
- gPESF = &ln2410_serial_functions;
- else if (!strcmp(serial_compat, "uart-1,samsung"))
- gPESF = &ln2410_serial_functions;
-#elif defined (ARM_BOARD_CONFIG_MV88F6710)
- if (!strcmp(serial_compat, "uart16x50,mmio"))
- gPESF = &uart16x50_serial_functions;
-#endif
- else
+ SecureDTGetProperty(entryP, "ubrdiv", (void const **)&prop_value, &prop_size);
+ if (prop_value) {
+ dt_ubrdiv = *prop_value;
+ }
+ }
+
+ 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 */
+
+ if (gPESF == NULL) {
return 0;
+ }
+
+ fns = gPESF;
+ while (fns != NULL) {
+ fns->uart_init();
+ fns = fns->next;
+ }
- gPESF->uart_init();
+#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;
void
uart_putc(char c)
{
- if (uart_initted) {
- while (!gPESF->tr0()); /* Wait until THR is empty. */
- gPESF->td0(c);
+ 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);
+ fns = fns->next;
}
}
int
uart_getc(void)
-{ /* returns -1 if no data available */
- if (uart_initted) {
- if (!gPESF->rr0())
- return -1; /* Receive data read */
- return gPESF->rd0();
+{ /* returns -1 if no data available */
+ struct pe_serial_functions *fns = gPESF;
+ while (fns != NULL) {
+ if (fns->rr0()) {
+ return fns->rd0();
+ }
+ fns = fns->next;
}
return -1;
}
projects / apple / xnu.git / blobdiff