[PATCH 1/2] platform: Remove platform/thead
guoren at kernel.org
guoren at kernel.org
Sat Apr 24 03:01:16 BST 2021
From: Guo Ren <guoren at linux.alibaba.com>
We could use platform/generic instead, and won't use it again.
Signed-off-by: Guo Ren <guoren at linux.alibaba.com>
Cc: Anup Patel <anup.patel at wdc.com>
---
docs/platform/platform.md | 3 -
docs/platform/thead-c910.md | 34 ---------
platform/thead/c910/config.mk | 14 ----
platform/thead/c910/objects.mk | 5 --
platform/thead/c910/platform.c | 156 ---------------------------------------
platform/thead/c910/platform.h | 46 ------------
scripts/create-binary-archive.sh | 1 -
7 files changed, 259 deletions(-)
delete mode 100644 docs/platform/thead-c910.md
delete mode 100644 platform/thead/c910/config.mk
delete mode 100644 platform/thead/c910/objects.mk
delete mode 100644 platform/thead/c910/platform.c
delete mode 100644 platform/thead/c910/platform.h
diff --git a/docs/platform/platform.md b/docs/platform/platform.md
index 7f47068..b0cff37 100644
--- a/docs/platform/platform.md
+++ b/docs/platform/platform.md
@@ -28,9 +28,6 @@ OpenSBI currently supports the following virtual and hardware platforms:
* **Andes AE350 SoC**: Platform support for the Andes's SoC (AE350). More
details on this platform can be found in the file *[andes-ae350.md]*.
-* **T-HEAD C910**: Platform support for the T-HEAD C910 Processor. More
- details on this platform can be found in the file *[thead-c910.md]*.
-
* **Spike**: Platform support for the Spike emulator. More
details on this platform can be found in the file *[spike.md]*.
diff --git a/docs/platform/thead-c910.md b/docs/platform/thead-c910.md
deleted file mode 100644
index 786b47d..0000000
--- a/docs/platform/thead-c910.md
+++ /dev/null
@@ -1,34 +0,0 @@
-T-HEAD C910 Processor
-=====================
-C910 is a 12-stage, 3 issues, 8 executions, out-of-order 64-bit RISC-V CPU which
-supports 16 cores, runs with 2.5GHz, and is capable of running Linux.
-
-To build platform specific library and firmwares, provide the
-*PLATFORM=thead/c910* parameter to the top level make command.
-
-Platform Options
-----------------
-
-The *T-HEAD C910* platform does not have any platform-specific options.
-
-Building T-HEAD C910 Platform
------------------------------
-
-```
-make PLATFORM=thead/c910
-```
-
-Booting T-HEAD C910 Platform
-----------------------------
-
-**No Payload**
-
-As there's no payload, you may download vmlinux or u-boot to FW_JUMP_ADDR which
-specified in config.mk or compile commands with GDB. And the execution flow will
-turn to vmlinux or u-boot when opensbi ends.
-
-**Linux Kernel Payload**
-
-You can also choose to use Linux kernel as payload by enabling FW_PAYLOAD=y
-along with specifying FW_PAYLOAD_OFFSET. The kernel image will be embedded in
-the OPENSBI firmware binary, T-head will directly boot into Linux after OpenSBI.
diff --git a/platform/thead/c910/config.mk b/platform/thead/c910/config.mk
deleted file mode 100644
index bd5eab7..0000000
--- a/platform/thead/c910/config.mk
+++ /dev/null
@@ -1,14 +0,0 @@
-#
-# SPDX-License-Identifier: BSD-2-Clause
-#
-
-# Compiler flags
-platform-cppflags-y =
-platform-cflags-y =
-platform-asflags-y =
-platform-ldflags-y =
-
-# Blobs to build
-FW_TEXT_START?=0x0
-FW_JUMP=y
-FW_JUMP_ADDR?=0x00200000
diff --git a/platform/thead/c910/objects.mk b/platform/thead/c910/objects.mk
deleted file mode 100644
index d025a36..0000000
--- a/platform/thead/c910/objects.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-#
-# SPDX-License-Identifier: BSD-2-Clause
-#
-
-platform-objs-y += platform.o
diff --git a/platform/thead/c910/platform.c b/platform/thead/c910/platform.c
deleted file mode 100644
index dfa484a..0000000
--- a/platform/thead/c910/platform.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <sbi/riscv_encoding.h>
-#include <sbi/riscv_io.h>
-#include <sbi/sbi_console.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/uart8250.h>
-#include <sbi_utils/sys/clint.h>
-#include "platform.h"
-
-static struct c910_regs_struct c910_regs;
-
-static struct clint_data clint = {
- .addr = 0, /* Updated at cold boot time */
- .first_hartid = 0,
- .hart_count = C910_HART_COUNT,
- .has_64bit_mmio = FALSE,
-};
-
-static int c910_early_init(bool cold_boot)
-{
- if (cold_boot) {
- /* Load from boot core */
- c910_regs.pmpaddr0 = csr_read(CSR_PMPADDR0);
- c910_regs.pmpaddr1 = csr_read(CSR_PMPADDR1);
- c910_regs.pmpaddr2 = csr_read(CSR_PMPADDR2);
- c910_regs.pmpaddr3 = csr_read(CSR_PMPADDR3);
- c910_regs.pmpaddr4 = csr_read(CSR_PMPADDR4);
- c910_regs.pmpaddr5 = csr_read(CSR_PMPADDR5);
- c910_regs.pmpaddr6 = csr_read(CSR_PMPADDR6);
- c910_regs.pmpaddr7 = csr_read(CSR_PMPADDR7);
- c910_regs.pmpcfg0 = csr_read(CSR_PMPCFG0);
-
- c910_regs.mcor = csr_read(CSR_MCOR);
- c910_regs.mhcr = csr_read(CSR_MHCR);
- c910_regs.mccr2 = csr_read(CSR_MCCR2);
- c910_regs.mhint = csr_read(CSR_MHINT);
- c910_regs.mxstatus = csr_read(CSR_MXSTATUS);
-
- c910_regs.plic_base_addr = csr_read(CSR_PLIC_BASE);
- c910_regs.clint_base_addr =
- c910_regs.plic_base_addr + C910_PLIC_CLINT_OFFSET;
- } else {
- /* Store to other core */
- csr_write(CSR_PMPADDR0, c910_regs.pmpaddr0);
- csr_write(CSR_PMPADDR1, c910_regs.pmpaddr1);
- csr_write(CSR_PMPADDR2, c910_regs.pmpaddr2);
- csr_write(CSR_PMPADDR3, c910_regs.pmpaddr3);
- csr_write(CSR_PMPADDR4, c910_regs.pmpaddr4);
- csr_write(CSR_PMPADDR5, c910_regs.pmpaddr5);
- csr_write(CSR_PMPADDR6, c910_regs.pmpaddr6);
- csr_write(CSR_PMPADDR7, c910_regs.pmpaddr7);
- csr_write(CSR_PMPCFG0, c910_regs.pmpcfg0);
-
- csr_write(CSR_MCOR, c910_regs.mcor);
- csr_write(CSR_MHCR, c910_regs.mhcr);
- csr_write(CSR_MHINT, c910_regs.mhint);
- csr_write(CSR_MXSTATUS, c910_regs.mxstatus);
- }
-
- return 0;
-}
-
-static int c910_final_init(bool cold_boot)
-{
- return 0;
-}
-
-static int c910_irqchip_init(bool cold_boot)
-{
- /* Delegate plic enable into S-mode */
- writel(C910_PLIC_DELEG_ENABLE,
- (void *)c910_regs.plic_base_addr + C910_PLIC_DELEG_OFFSET);
-
- return 0;
-}
-
-static int c910_ipi_init(bool cold_boot)
-{
- int rc;
-
- if (cold_boot) {
- clint.addr = c910_regs.clint_base_addr;
- rc = clint_cold_ipi_init(&clint);
- if (rc)
- return rc;
- }
-
- return clint_warm_ipi_init();
-}
-
-static int c910_timer_init(bool cold_boot)
-{
- int ret;
-
- if (cold_boot) {
- clint.addr = c910_regs.clint_base_addr;
- ret = clint_cold_timer_init(&clint, NULL);
- if (ret)
- return ret;
- }
-
- return clint_warm_timer_init();
-}
-
-static int c910_system_reset_check(u32 type, u32 reason)
-{
- return 1;
-}
-
-static void c910_system_reset(u32 type, u32 reason)
-{
- asm volatile ("ebreak");
-}
-
-int c910_hart_start(u32 hartid, ulong saddr)
-{
- csr_write(CSR_MRVBR, saddr);
- csr_write(CSR_MRMR, csr_read(CSR_MRMR) | (1 << hartid));
-
- return 0;
-}
-
-const struct sbi_platform_operations platform_ops = {
- .early_init = c910_early_init,
- .final_init = c910_final_init,
-
- .irqchip_init = c910_irqchip_init,
-
- .ipi_init = c910_ipi_init,
- .ipi_send = clint_ipi_send,
- .ipi_clear = clint_ipi_clear,
-
- .timer_init = c910_timer_init,
- .timer_event_start = clint_timer_event_start,
-
- .system_reset_check = c910_system_reset_check,
- .system_reset = c910_system_reset,
-
- .hart_start = c910_hart_start,
-};
-
-const struct sbi_platform platform = {
- .opensbi_version = OPENSBI_VERSION,
- .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01),
- .name = "T-HEAD Xuantie c910",
- .features = SBI_THEAD_FEATURES,
- .hart_count = C910_HART_COUNT,
- .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE,
- .platform_ops_addr = (unsigned long)&platform_ops
-};
diff --git a/platform/thead/c910/platform.h b/platform/thead/c910/platform.h
deleted file mode 100644
index 354404e..0000000
--- a/platform/thead/c910/platform.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#ifndef _C910_PLATFORM_H_
-#define _C910_PLATFORM_H_
-
-#define C910_HART_COUNT 16
-
-#define SBI_THEAD_FEATURES \
- (SBI_PLATFORM_HAS_MFAULTS_DELEGATION | \
- SBI_PLATFORM_HAS_HART_SECONDARY_BOOT)
-
-#define CSR_MCOR 0x7c2
-#define CSR_MHCR 0x7c1
-#define CSR_MCCR2 0x7c3
-#define CSR_MHINT 0x7c5
-#define CSR_MXSTATUS 0x7c0
-#define CSR_PLIC_BASE 0xfc1
-#define CSR_MRMR 0x7c6
-#define CSR_MRVBR 0x7c7
-
-#define C910_PLIC_CLINT_OFFSET 0x04000000 /* 64M */
-#define C910_PLIC_DELEG_OFFSET 0x001ffffc
-#define C910_PLIC_DELEG_ENABLE 0x1
-
-struct c910_regs_struct {
- u64 pmpaddr0;
- u64 pmpaddr1;
- u64 pmpaddr2;
- u64 pmpaddr3;
- u64 pmpaddr4;
- u64 pmpaddr5;
- u64 pmpaddr6;
- u64 pmpaddr7;
- u64 pmpcfg0;
- u64 mcor;
- u64 mhcr;
- u64 mccr2;
- u64 mhint;
- u64 mxstatus;
- u64 plic_base_addr;
- u64 clint_base_addr;
-};
-
-#endif /* _C910_PLATFORM_H_ */
diff --git a/scripts/create-binary-archive.sh b/scripts/create-binary-archive.sh
index c19af26..a8bd335 100755
--- a/scripts/create-binary-archive.sh
+++ b/scripts/create-binary-archive.sh
@@ -106,7 +106,6 @@ build_opensbi() {
BUILD_PLATFORM_SUBDIR+=("fpga/ariane")
BUILD_PLATFORM_SUBDIR+=("fpga/openpiton")
BUILD_PLATFORM_SUBDIR+=("andes/ae350")
- BUILD_PLATFORM_SUBDIR+=("thead/c910")
BUILD_PLATFORM_SUBDIR+=("generic")
;;
*)
--
2.7.4
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