platform: Drop qemu/sifive_u support

With QEMU v4.2 RISC-V changes to improve the emulation fidelity
of 'sifive_u' machine, OpenSBI v0.4 / U-Boot v2019.10 / Linux
kernel v5.3 images built for the SiFive HiFive Unleashed board
can be used out of the box without any special hack. Hence there
is no need for us to continue supporting such a special target in
OpenSBI. Going forward, sifive/fu540 platform can be used on both
real hardware and QEMU 'sifive_u' machine.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>

3 files changed, 0 insertions, 208 deletions

diff --git a/platform/qemu/sifive_u/config.mk b/platform/qemu/sifive_u/config.mk
deleted file mode 100644
index f66a555..0000000
--- a/platform/qemu/sifive_u/config.mk
+++ /dev/null
@@ -1,40 +0,0 @@
-#
-# SPDX-License-Identifier: BSD-2-Clause
-#
-# Copyright (c) 2019 Western Digital Corporation or its affiliates.
-#
-# Authors:
-#   Anup Patel <anup.patel@wdc.com>
-#
-
-# Compiler flags
-platform-cppflags-y =
-platform-cflags-y =
-platform-asflags-y =
-platform-ldflags-y =
-
-# Command for platform specific "make run"
-platform-runcmd = qemu-system-riscv$(PLATFORM_RISCV_XLEN) -M sifive_u -m 256M \
-  -nographic -kernel $(build_dir)/platform/qemu/sifive_u/firmware/fw_payload.elf
-
-# Blobs to build
-FW_TEXT_START=0x80000000
-FW_DYNAMIC=y
-FW_JUMP=y
-ifeq ($(PLATFORM_RISCV_XLEN), 32)
-  # This needs to be 4MB alligned for 32-bit system
-  FW_JUMP_ADDR=0x80400000
-else
-  # This needs to be 2MB alligned for 64-bit system
-  FW_JUMP_ADDR=0x80200000
-endif
-FW_JUMP_FDT_ADDR=0x82200000
-FW_PAYLOAD=y
-ifeq ($(PLATFORM_RISCV_XLEN), 32)
-  # This needs to be 4MB alligned for 32-bit system
-  FW_PAYLOAD_OFFSET=0x400000
-else
-  # This needs to be 2MB alligned for 64-bit system
-  FW_PAYLOAD_OFFSET=0x200000
-endif
-FW_PAYLOAD_FDT_ADDR=0x82200000
diff --git a/platform/qemu/sifive_u/objects.mk b/platform/qemu/sifive_u/objects.mk
deleted file mode 100644
index c382cbf..0000000
--- a/platform/qemu/sifive_u/objects.mk
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# SPDX-License-Identifier: BSD-2-Clause
-#
-# Copyright (c) 2019 Western Digital Corporation or its affiliates.
-#
-# Authors:
-#   Anup Patel <anup.patel@wdc.com>
-#
-
-platform-objs-y += platform.o
diff --git a/platform/qemu/sifive_u/platform.c b/platform/qemu/sifive_u/platform.c
deleted file mode 100644
index 47d6b23..0000000
--- a/platform/qemu/sifive_u/platform.c
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- *   Anup Patel <anup.patel@wdc.com>
- */
-
-#include <sbi/riscv_encoding.h>
-#include <sbi/sbi_const.h>
-#include <sbi/sbi_hart.h>
-#include <sbi/sbi_platform.h>
-#include <sbi_utils/irqchip/plic.h>
-#include <sbi_utils/serial/sifive-uart.h>
-#include <sbi_utils/sys/clint.h>
-
-/* clang-format off */
-
-#define SIFIVE_U_HART_COUNT			4
-#define SIFIVE_U_HART_STACK_SIZE		8192
-
-#define SIFIVE_U_SYS_CLK			1000000000
-#define SIFIVE_U_PERIPH_CLK			(SIFIVE_U_SYS_CLK / 2)
-
-#define SIFIVE_U_CLINT_ADDR			0x2000000
-
-#define SIFIVE_U_PLIC_ADDR			0xc000000
-#define SIFIVE_U_PLIC_NUM_SOURCES		0x35
-#define SIFIVE_U_PLIC_NUM_PRIORITIES		7
-
-#define SIFIVE_U_UART0_ADDR			0x10010000
-#define SIFIVE_U_UART1_ADDR			0x10011000
-
-/* clang-format on */
-
-static int sifive_u_final_init(bool cold_boot)
-{
-	void *fdt;
-
-	if (!cold_boot)
-		return 0;
-
-	fdt = sbi_scratch_thishart_arg1_ptr();
-	plic_fdt_fixup(fdt, "riscv,plic0");
-
-	return 0;
-}
-
-static u32 sifive_u_pmp_region_count(u32 hartid)
-{
-	return 1;
-}
-
-static int sifive_u_pmp_region_info(u32 hartid, 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 sifive_u_console_init(void)
-{
-	return sifive_uart_init(SIFIVE_U_UART0_ADDR, SIFIVE_U_PERIPH_CLK,
-				115200);
-}
-
-static int sifive_u_irqchip_init(bool cold_boot)
-{
-	int rc;
-	u32 hartid = sbi_current_hartid();
-
-	if (cold_boot) {
-		rc = plic_cold_irqchip_init(SIFIVE_U_PLIC_ADDR,
-					    SIFIVE_U_PLIC_NUM_SOURCES,
-					    SIFIVE_U_HART_COUNT);
-		if (rc)
-			return rc;
-	}
-
-	return plic_warm_irqchip_init(hartid, (2 * hartid), (2 * hartid + 1));
-}
-
-static int sifive_u_ipi_init(bool cold_boot)
-{
-	int rc;
-
-	if (cold_boot) {
-		rc = clint_cold_ipi_init(SIFIVE_U_CLINT_ADDR,
-					 SIFIVE_U_HART_COUNT);
-		if (rc)
-			return rc;
-	}
-
-	return clint_warm_ipi_init();
-}
-
-static int sifive_u_timer_init(bool cold_boot)
-{
-	int rc;
-
-	if (cold_boot) {
-		rc = clint_cold_timer_init(SIFIVE_U_CLINT_ADDR,
-					   SIFIVE_U_HART_COUNT, TRUE);
-		if (rc)
-			return rc;
-	}
-
-	return clint_warm_timer_init();
-}
-
-static int sifive_u_system_down(u32 type)
-{
-	/* For now nothing to do. */
-	return 0;
-}
-
-const struct sbi_platform_operations platform_ops = {
-	.pmp_region_count	= sifive_u_pmp_region_count,
-	.pmp_region_info	= sifive_u_pmp_region_info,
-	.final_init		= sifive_u_final_init,
-	.console_putc		= sifive_uart_putc,
-	.console_getc		= sifive_uart_getc,
-	.console_init		= sifive_u_console_init,
-	.irqchip_init		= sifive_u_irqchip_init,
-	.ipi_send		= clint_ipi_send,
-	.ipi_clear		= clint_ipi_clear,
-	.ipi_init		= sifive_u_ipi_init,
-	.timer_value		= clint_timer_value,
-	.timer_event_stop	= clint_timer_event_stop,
-	.timer_event_start	= clint_timer_event_start,
-	.timer_init		= sifive_u_timer_init,
-	.system_reboot		= sifive_u_system_down,
-	.system_shutdown	= sifive_u_system_down
-};
-
-const struct sbi_platform platform = {
-	.opensbi_version	= OPENSBI_VERSION,
-	.platform_version	= SBI_PLATFORM_VERSION(0x0, 0x01),
-	.name			= "QEMU SiFive Unleashed",
-	.features		= SBI_PLATFORM_DEFAULT_FEATURES,
-	.hart_count		= SIFIVE_U_HART_COUNT,
-	.hart_stack_size	= SIFIVE_U_HART_STACK_SIZE,
-	.disabled_hart_mask	= 0,
-	.platform_ops_addr	= (unsigned long)&platform_ops
-};