Add pine64 star64 platform

This adds a timer and serial driver to libplatsupport.

Co-developed-by: Ivan-Velickovic <i.velickovic@unsw.edu.au>
Signed-off-by: Jimmy Brush <code@jimmah.com>

libplatsupport/plat_include/star64/platsupport/plat/serial.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2023, UNSW
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+#include <autoconf.h>
+
+/* The StarFive JH7110 SoC contains five 8250 compatible UARTs. */
+
+enum chardev_id {
+    UART0,
+    UART1,
+    UART2,
+    UART3,
+    UART4,
+    UART5,
+    PS_SERIAL_DEFAULT = UART0
+};
+
+#define UART0_PADDR 0x10000000
+#define UART1_PADDR 0x10010000
+#define UART2_PADDR 0x10020000
+#define UART3_PADDR 0x12000000
+#define UART4_PADDR 0x12010000
+#define UART5_PADDR 0x12020000
+
+#define UART0_IRQ 32
+#define UART1_IRQ 33
+#define UART2_IRQ 34
+#define UART3_IRQ 45
+#define UART4_IRQ 46
+#define UART5_IRQ 47
+
+/* The default serial device corresponds to the UART available via the GPIO
+ * pins of the Star64 Model-A. */
+#define DEFAULT_SERIAL_PADDR UART0_PADDR
+#define DEFAULT_SERIAL_INTERRUPT UART0_IRQ

libplatsupport/plat_include/star64/platsupport/plat/timer.h

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2023, UNSW
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/*
+ * The JH7110 SoC contains a timer with four 32-bit counters. Each one of these
+ * counters is referred to as a "channel".
+ */
+
+/* Channel information */
+#define STARFIVE_TIMER_NUM_CHANNELS 4
+#define STARFIVE_TIMER_CHANNEL_REGISTERS_LEN_IN_BYTES 0x40
+#define STARFIVE_TIMER_CHANNEL_0_IRQ 69
+#define STARFIVE_TIMER_CHANNEL_1_IRQ 70
+#define STARFIVE_TIMER_CHANNEL_2_IRQ 71
+#define STARFIVE_TIMER_CHANNEL_3_IRQ 72
+
+/* This information comes from the DTS file */
+#define STARFIVE_TIMER_BASE 0x13050000
+#define STARFIVE_TIMER_REGISTER_WINDOW_LEN_IN_BYTES 0x10000
+#define STARFIVE_TIMER_TICKS_PER_SECOND 0x16e3600
+
+#define STARFIVE_TIMER_MAX_TICKS 0xffffffff
+
+/* Register value constants */
+#define STARFIVE_TIMER_MODE_CONTINUOUS 0
+#define STARFIVE_TIMER_MODE_SINGLE 1
+#define STARFIVE_TIMER_DISABLED 0
+#define STARFIVE_TIMER_ENABLED 1
+#define STARFIVE_TIMER_INTERRUPT_UNMASKED 0
+#define STARFIVE_TIMER_INTERRUPT_MASKED 1
+#define STARFIVE_TIMER_INTCLR_BUSY BIT(1)
+
+typedef struct {
+    /* Registers */
+    /* this register doesn't seem to do anything */
+    uint32_t status;
+    uint32_t ctrl;
+    uint32_t load;
+    uint32_t unknown1;
+    uint32_t enable;
+    uint32_t reload;
+    uint32_t value;
+    uint32_t unknown2;
+    uint32_t intclr;
+    uint32_t intmask;
+} starfive_timer_regs_t;
+
+typedef struct {
+    volatile starfive_timer_regs_t *regs;
+    /*
+     * Stores the number of times the continuous counter timer has elapsed and started over.
+     * This allows us to count to a higher number than allowed by the hardware.
+     */
+    uint32_t value_h;
+} starfive_timer_t;
+
+void starfive_timer_start(starfive_timer_t *timer);
+void starfive_timer_stop(starfive_timer_t *timer);
+void starfive_timer_handle_irq(starfive_timer_t *timer);
+uint64_t starfive_timer_get_time(starfive_timer_t *timer);
+void starfive_timer_reset(starfive_timer_t *timer);
+int starfive_timer_set_timeout(starfive_timer_t *timer, uint64_t ns, bool is_periodic);
+void starfive_timer_disable_all_channels(void *vaddr);
+void starfive_timer_init(starfive_timer_t *timer, void *vaddr, uint64_t channel);

libplatsupport/src/plat/star64/chardev.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2023, UNSW
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "../../chardev.h"
+#include "../../common.h"
+#include <utils/util.h>
+
+static const int uart0_irqs[] = {UART0_IRQ, -1};
+static const int uart1_irqs[] = {UART1_IRQ, -1};
+static const int uart2_irqs[] = {UART2_IRQ, -1};
+static const int uart3_irqs[] = {UART3_IRQ, -1};
+static const int uart4_irqs[] = {UART4_IRQ, -1};
+static const int uart5_irqs[] = {UART5_IRQ, -1};
+
+/*
+ * Despite each UART being 0x10000 in size (according to the device tree) we
+ * only need to map in the first page for the driver to functon.
+ */
+#define UART_DEFN(devid) {          \
+    .id      = UART##devid,    \
+    .paddr   = UART##devid##_PADDR, \
+    .size    = BIT(12),             \
+    .irqs    = uart##devid##_irqs,  \
+    .init_fn = &uart_init           \
+}
+
+const struct dev_defn dev_defn[] = {
+    UART_DEFN(0),
+    UART_DEFN(1),
+    UART_DEFN(2),
+    UART_DEFN(3),
+    UART_DEFN(4),
+    UART_DEFN(5),
+};
+
+struct ps_chardevice*
+ps_cdev_init(enum chardev_id id, const ps_io_ops_t* o, struct ps_chardevice* d) {
+    unsigned int i;
+    for (i = 0; i < ARRAY_SIZE(dev_defn); i++) {
+        if (dev_defn[i].id == id) {
+            return (dev_defn[i].init_fn(dev_defn + i, o, d)) ? NULL : d;
+        }
+    }
+    return NULL;
+}