top: Rename "plat" to "platform" everywhere

This patch renames "plat" to "platform" everywhere for better
readablility.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

platform/qemu/virt/config.mk

@@ -0,0 +1,32 @@
+#
+# Copyright (c) 2018 Western Digital Corporation or its affiliates.
+#
+# Authors:
+#   Anup Patel <anup.patel@wdc.com>
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+
+# Essential defines required by SBI platform
+platform-cppflags-y = -DPLAT_NAME="QEMU Virt Machine"
+platform-cppflags-y+= -DPLAT_HART_COUNT=8
+platform-cppflags-y+= -DPLAT_HART_STACK_SIZE=8192
+
+# Compiler flags
+platform-cflags-y =-mabi=lp64 -march=rv64imafdc -mcmodel=medany
+platform-asflags-y =-mabi=lp64 -march=rv64imafdc -mcmodel=medany
+platform-ldflags-y =
+
+# Common drivers to enable
+PLATFORM_IRQCHIP_PLIC=y
+PLATFORM_SERIAL_UART8250=y
+PLATFORM_SYS_CLINT=y
+
+# Blobs to build
+FW_TEXT_START=0x80000000
+FW_JUMP=y
+FW_JUMP_ADDR=0x80200000
+FW_JUMP_FDT_ADDR=0x82200000
+FW_PAYLOAD=y
+FW_PAYLOAD_OFFSET=0x200000
+FW_PAYLOAD_FDT_ADDR=0x82200000

platform/qemu/virt/objects.mk

@@ -0,0 +1,10 @@
+#
+# Copyright (c) 2018 Western Digital Corporation or its affiliates.
+#
+# Authors:
+#   Anup Patel <anup.patel@wdc.com>
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+
+platform-objs-y += platform.o

platform/qemu/virt/platform.c

@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2018 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <sbi/riscv_encoding.h>
+#include <sbi/sbi_const.h>
+#include <sbi/sbi_platform.h>
+#include <plat/irqchip/plic.h>
+#include <plat/serial/uart8250.h>
+#include <plat/sys/clint.h>
+
+#define VIRT_TEST_ADDR			0x100000
+
+#define VIRT_CLINT_ADDR			0x2000000
+
+#define VIRT_PLIC_ADDR			0xc000000
+#define VIRT_PLIC_NUM_SOURCES		127
+#define VIRT_PLIC_NUM_PRIORITIES	7
+
+#define VIRT_UART16550_ADDR		0x10000000
+
+static int virt_cold_final_init(void)
+{
+	return plic_fdt_fixup(sbi_scratch_thishart_arg1_ptr(), "riscv,plic0");
+}
+
+static u32 virt_pmp_region_count(u32 target_hart)
+{
+	return 1;
+}
+
+static int virt_pmp_region_info(u32 target_hart, u32 index,
+				ulong *prot, ulong *addr, ulong *log2size)
+{
+	int ret = 0;
+
+	switch (index) {
+	case 0:
+		*prot = PMP_R | PMP_W | PMP_X;
+		*addr = 0;
+		*log2size = __riscv_xlen;
+		break;
+	default:
+		ret = -1;
+		break;
+	};
+
+	return ret;
+}
+
+static int virt_console_init(void)
+{
+	return uart8250_init(VIRT_UART16550_ADDR,
+			     1843200, 115200, 0, 1);
+}
+
+static int virt_cold_irqchip_init(void)
+{
+	return plic_cold_irqchip_init(VIRT_PLIC_ADDR,
+				      VIRT_PLIC_NUM_SOURCES,
+				      PLAT_HART_COUNT);
+}
+
+static int virt_cold_ipi_init(void)
+{
+	return clint_cold_ipi_init(VIRT_CLINT_ADDR,
+				   PLAT_HART_COUNT);
+}
+
+static int virt_cold_timer_init(void)
+{
+	return clint_cold_timer_init(VIRT_CLINT_ADDR,
+				     PLAT_HART_COUNT);
+}
+
+static int virt_system_down(u32 type)
+{
+	/* For now nothing to do. */
+	return 0;
+}
+
+struct sbi_platform platform = {
+	.name = STRINGIFY(PLAT_NAME),
+	.features = SBI_PLATFORM_HAS_MMIO_TIMER_VALUE,
+	.hart_count = PLAT_HART_COUNT,
+	.hart_stack_size = PLAT_HART_STACK_SIZE,
+	.pmp_region_count = virt_pmp_region_count,
+	.pmp_region_info = virt_pmp_region_info,
+	.cold_final_init = virt_cold_final_init,
+	.console_putc = uart8250_putc,
+	.console_getc = uart8250_getc,
+	.console_init = virt_console_init,
+	.cold_irqchip_init = virt_cold_irqchip_init,
+	.warm_irqchip_init = plic_warm_irqchip_init,
+	.ipi_inject = clint_ipi_inject,
+	.ipi_sync = clint_ipi_sync,
+	.ipi_clear = clint_ipi_clear,
+	.warm_ipi_init = clint_warm_ipi_init,
+	.cold_ipi_init = virt_cold_ipi_init,
+	.timer_value = clint_timer_value,
+	.timer_event_stop = clint_timer_event_stop,
+	.timer_event_start = clint_timer_event_start,
+	.warm_timer_init = clint_warm_timer_init,
+	.cold_timer_init = virt_cold_timer_init,
+	.system_reboot = virt_system_down,
+	.system_shutdown = virt_system_down
+};