[PATCH v4 7/7] soc: renesas: Add L2 cache management for RZ/Five SoC
Prabhakar
prabhakar.csengg at gmail.com
Thu Nov 24 09:22:07 PST 2022
From: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
On the AX45MP core, cache coherency is a specification option so it may
not be supported. In this case DMA will fail. As a workaround, firstly we
allocate a global dma coherent pool from which DMA allocations are taken
and marked as non-cacheable + bufferable using the PMA region as specified
in the device tree. Synchronization callbacks are implemented to
synchronize when doing DMA transactions.
The Andes AX45MP core has a Programmable Physical Memory Attributes (PMA)
block that allows dynamic adjustment of memory attributes in the runtime.
It contains a configurable amount of PMA entries implemented as CSR
registers to control the attributes of memory locations in interest.
Below are the memory attributes supported:
* Device, Non-bufferable
* Device, bufferable
* Memory, Non-cacheable, Non-bufferable
* Memory, Non-cacheable, Bufferable
* Memory, Write-back, No-allocate
* Memory, Write-back, Read-allocate
* Memory, Write-back, Write-allocate
* Memory, Write-back, Read and Write-allocate
This patch adds support to configure the memory attributes of the memory
regions as passed from the l2 cache node and exposes the cache management
ops.
More info about PMA (section 10.3):
Link: http://www.andestech.com/wp-content/uploads/AX45MP-1C-Rev.-5.0.0-Datasheet.pdf
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
---
RFC v3 -> v4
* Made use of runtime patching instead of compile time
* Now just exposing single function ax45mp_no_iocp_cmo() for CMO handling
* Added a check to make sure cache line size is always 64 bytes
* Renamed folder rzf -> rzfive
* Improved Kconfig description
* Dropped L2 cache configuration
* Dropped unnecessary casts
* Fixed comments pointed by Geert, apart from use of PTR_ALIGN_XYZ() macros.
---
arch/riscv/include/asm/cacheflush.h | 8 +
arch/riscv/include/asm/errata_list.h | 32 +-
drivers/soc/renesas/Kconfig | 7 +
drivers/soc/renesas/Makefile | 2 +
drivers/soc/renesas/rzfive/Kconfig | 6 +
drivers/soc/renesas/rzfive/Makefile | 3 +
drivers/soc/renesas/rzfive/ax45mp_cache.c | 415 ++++++++++++++++++++++
drivers/soc/renesas/rzfive/ax45mp_sbi.h | 29 ++
8 files changed, 496 insertions(+), 6 deletions(-)
create mode 100644 drivers/soc/renesas/rzfive/Kconfig
create mode 100644 drivers/soc/renesas/rzfive/Makefile
create mode 100644 drivers/soc/renesas/rzfive/ax45mp_cache.c
create mode 100644 drivers/soc/renesas/rzfive/ax45mp_sbi.h
diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h
index 4a04d1be7c67..3226f3aceafe 100644
--- a/arch/riscv/include/asm/cacheflush.h
+++ b/arch/riscv/include/asm/cacheflush.h
@@ -61,6 +61,14 @@ static inline void riscv_noncoherent_supported(void) {}
#define SYS_RISCV_FLUSH_ICACHE_LOCAL 1UL
#define SYS_RISCV_FLUSH_ICACHE_ALL (SYS_RISCV_FLUSH_ICACHE_LOCAL)
+#ifdef CONFIG_AX45MP_L2_CACHE
+extern asmlinkage void ax45mp_no_iocp_cmo(unsigned int cache_size, void *vaddr,
+ size_t size, int dir, int ops);
+#else
+inline void ax45mp_no_iocp_cmo(unsigned int cache_size, void *vaddr,
+ size_t size, int dir, int ops) {}
+#endif
+
#include <asm-generic/cacheflush.h>
#endif /* _ASM_RISCV_CACHEFLUSH_H */
diff --git a/arch/riscv/include/asm/errata_list.h b/arch/riscv/include/asm/errata_list.h
index 48e899a8e7a9..300fed3bfd80 100644
--- a/arch/riscv/include/asm/errata_list.h
+++ b/arch/riscv/include/asm/errata_list.h
@@ -125,8 +125,8 @@ asm volatile(ALTERNATIVE( \
#define THEAD_SYNC_S ".long 0x0190000b"
#define ALT_CMO_OP(_op, _start, _size, _cachesize, _dir, _ops) \
-asm volatile(ALTERNATIVE_2( \
- __nops(6), \
+asm volatile(ALTERNATIVE_3( \
+ __nops(14), \
"mv a0, %1\n\t" \
"j 2f\n\t" \
"3:\n\t" \
@@ -134,7 +134,7 @@ asm volatile(ALTERNATIVE_2( \
"add a0, a0, %0\n\t" \
"2:\n\t" \
"bltu a0, %2, 3b\n\t" \
- "nop", 0, CPUFEATURE_ZICBOM, CONFIG_RISCV_ISA_ZICBOM, \
+ __nops(8), 0, CPUFEATURE_ZICBOM, CONFIG_RISCV_ISA_ZICBOM, \
"mv a0, %1\n\t" \
"j 2f\n\t" \
"3:\n\t" \
@@ -142,8 +142,28 @@ asm volatile(ALTERNATIVE_2( \
"add a0, a0, %0\n\t" \
"2:\n\t" \
"bltu a0, %2, 3b\n\t" \
- THEAD_SYNC_S, THEAD_VENDOR_ID, \
- ERRATA_THEAD_CMO, CONFIG_ERRATA_THEAD_CMO) \
+ THEAD_SYNC_S "\n\t" \
+ __nops(8), THEAD_VENDOR_ID, \
+ ERRATA_THEAD_CMO, CONFIG_ERRATA_THEAD_CMO, \
+ ".option push\n\t\n\t" \
+ ".option norvc\n\t" \
+ ".option norelax\n\t" \
+ "addi sp,sp,-16\n\t" \
+ "sd s0,0(sp)\n\t" \
+ "sd ra,8(sp)\n\t" \
+ "addi s0,sp,16\n\t" \
+ "mv a4,%6\n\t" \
+ "mv a3,%5\n\t" \
+ "mv a2,%4\n\t" \
+ "mv a1,%3\n\t" \
+ "mv a0,%0\n\t" \
+ "call ax45mp_no_iocp_cmo\n\t" \
+ "ld ra,8(sp)\n\t" \
+ "ld s0,0(sp)\n\t" \
+ "addi sp,sp,16\n\t" \
+ ".option pop\n\t", \
+ ANDESTECH_VENDOR_ID, ERRATA_ANDESTECH_NO_IOCP, \
+ CONFIG_ERRATA_ANDES_CMO) \
: : "r"(_cachesize), \
"r"((unsigned long)(_start) & ~((_cachesize) - 1UL)), \
"r"((unsigned long)(_start) + (_size)), \
@@ -151,7 +171,7 @@ asm volatile(ALTERNATIVE_2( \
"r"((unsigned long)(_size)), \
"r"((unsigned long)(_dir)), \
"r"((unsigned long)(_ops)) \
- : "a0")
+ : "a0", "a1", "a2", "a3", "a4", "memory")
#define THEAD_C9XX_RV_IRQ_PMU 17
#define THEAD_C9XX_CSR_SCOUNTEROF 0x5c5
diff --git a/drivers/soc/renesas/Kconfig b/drivers/soc/renesas/Kconfig
index 660498252ec5..e7810256c60d 100644
--- a/drivers/soc/renesas/Kconfig
+++ b/drivers/soc/renesas/Kconfig
@@ -340,9 +340,16 @@ if RISCV
config ARCH_R9A07G043
bool "RISC-V Platform support for RZ/Five"
select ARCH_RZG2L
+ select AX45MP_L2_CACHE
+ select DMA_GLOBAL_POOL
+ select ERRATA_ANDES
+ select ERRATA_ANDES_CMO
+ select RISCV_DMA_NONCOHERENT
help
This enables support for the Renesas RZ/Five SoC.
+source "drivers/soc/renesas/rzfive/Kconfig"
+
endif # RISCV
config RST_RCAR
diff --git a/drivers/soc/renesas/Makefile b/drivers/soc/renesas/Makefile
index 535868c9c7e4..9df9f759a039 100644
--- a/drivers/soc/renesas/Makefile
+++ b/drivers/soc/renesas/Makefile
@@ -31,6 +31,8 @@ ifdef CONFIG_SMP
obj-$(CONFIG_ARCH_R9A06G032) += r9a06g032-smp.o
endif
+obj-$(CONFIG_RISCV) += rzfive/
+
# Family
obj-$(CONFIG_RST_RCAR) += rcar-rst.o
obj-$(CONFIG_SYSC_RCAR) += rcar-sysc.o
diff --git a/drivers/soc/renesas/rzfive/Kconfig b/drivers/soc/renesas/rzfive/Kconfig
new file mode 100644
index 000000000000..b6bc00337d99
--- /dev/null
+++ b/drivers/soc/renesas/rzfive/Kconfig
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config AX45MP_L2_CACHE
+ bool "Andes Technology AX45MP L2 Cache controller"
+ help
+ Support for the L2 cache controller on Andes Technology AX45MP platforms.
diff --git a/drivers/soc/renesas/rzfive/Makefile b/drivers/soc/renesas/rzfive/Makefile
new file mode 100644
index 000000000000..2012e7fb978d
--- /dev/null
+++ b/drivers/soc/renesas/rzfive/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_AX45MP_L2_CACHE) += ax45mp_cache.o
diff --git a/drivers/soc/renesas/rzfive/ax45mp_cache.c b/drivers/soc/renesas/rzfive/ax45mp_cache.c
new file mode 100644
index 000000000000..4e0d0545d3af
--- /dev/null
+++ b/drivers/soc/renesas/rzfive/ax45mp_cache.c
@@ -0,0 +1,415 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PMA setup and non-coherent cache functions for Andes AX45MP
+ *
+ * Copyright (C) 2022 Renesas Electronics Corp.
+ */
+
+#include <linux/cacheflush.h>
+#include <linux/cacheinfo.h>
+#include <linux/dma-direction.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+#include <asm/cacheflush.h>
+#include <asm/sbi.h>
+
+#include "ax45mp_sbi.h"
+
+/* L2 cache registers */
+#define AX45MP_L2C_REG_CTL_OFFSET 0x8
+
+#define AX45MP_L2C_REG_C0_CMD_OFFSET 0x40
+#define AX45MP_L2C_REG_C0_ACC_OFFSET 0x48
+#define AX45MP_L2C_REG_STATUS_OFFSET 0x80
+
+/* D-cache operation */
+#define AX45MP_CCTL_L1D_VA_INVAL 0
+#define AX45MP_CCTL_L1D_VA_WB 1
+
+/* L2 cache */
+#define AX45MP_L2_CACHE_CTL_CEN_MASK 1
+
+/* L2 CCTL status */
+#define AX45MP_CCTL_L2_STATUS_IDLE 0
+
+/* L2 CCTL status cores mask */
+#define AX45MP_CCTL_L2_STATUS_C0_MASK 0xf
+
+/* L2 cache operation */
+#define AX45MP_CCTL_L2_PA_INVAL 0x8
+#define AX45MP_CCTL_L2_PA_WB 0x9
+
+#define AX45MP_L2C_HPM_PER_CORE_OFFSET 0x8
+#define AX45MP_L2C_REG_PER_CORE_OFFSET 0x10
+#define AX45MP_CCTL_L2_STATUS_PER_CORE_OFFSET 4
+
+#define AX45MP_L2C_REG_CN_CMD_OFFSET(n) \
+ (AX45MP_L2C_REG_C0_CMD_OFFSET + ((n) * AX45MP_L2C_REG_PER_CORE_OFFSET))
+#define AX45MP_L2C_REG_CN_ACC_OFFSET(n) \
+ (AX45MP_L2C_REG_C0_ACC_OFFSET + ((n) * AX45MP_L2C_REG_PER_CORE_OFFSET))
+#define AX45MP_CCTL_L2_STATUS_CN_MASK(n) \
+ (AX45MP_CCTL_L2_STATUS_C0_MASK << ((n) * AX45MP_CCTL_L2_STATUS_PER_CORE_OFFSET))
+
+#define AX45MP_MICM_CFG_ISZ_OFFSET 6
+#define AX45MP_MICM_CFG_ISZ_MASK (0x7 << AX45MP_MICM_CFG_ISZ_OFFSET)
+
+#define AX45MP_MDCM_CFG_DSZ_OFFSET 6
+#define AX45MP_MDCM_CFG_DSZ_MASK (0x7 << AX45MP_MDCM_CFG_DSZ_OFFSET)
+
+#define AX45MP_CCTL_REG_UCCTLBEGINADDR_NUM 0x80b
+#define AX45MP_CCTL_REG_UCCTLCOMMAND_NUM 0x80c
+
+#define AX45MP_MCACHE_CTL_CCTL_SUEN_OFFSET 8
+#define AX45MP_MMSC_CFG_CCTLCSR_OFFSET 16
+#define AX45MP_MISA_20_OFFSET 20
+
+#define AX45MP_MCACHE_CTL_CCTL_SUEN_MASK (0x1 << AX45MP_MCACHE_CTL_CCTL_SUEN_OFFSET)
+#define AX45MP_MMSC_CFG_CCTLCSR_MASK (0x1 << AX45MP_MMSC_CFG_CCTLCSR_OFFSET)
+#define AX45MP_MISA_20_MASK (0x1 << AX45MP_MISA_20_OFFSET)
+
+#define AX45MP_MAX_CACHE_LINE_SIZE 256
+
+#define AX45MP_MAX_PMA_REGIONS 16
+
+struct ax45mp_priv {
+ void __iomem *l2c_base;
+ u32 ax45mp_cache_line_size;
+ bool l2cache_enabled;
+ bool ucctl_ok;
+};
+
+static struct ax45mp_priv *ax45mp_priv;
+static DEFINE_STATIC_KEY_FALSE(ax45mp_l2c_configured);
+
+/* PMA setup */
+static long ax45mp_sbi_set_pma(unsigned long start,
+ unsigned long size,
+ unsigned long flags,
+ unsigned int entry_id)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_ANDES, AX45MP_SBI_EXT_SET_PMA,
+ start, size, entry_id, flags, 0, 0);
+
+ return ret.value;
+}
+
+static int ax45mp_configure_pma_regions(struct device_node *np)
+{
+ const char *propname = "andestech,pma-regions";
+ u32 start, size, flags;
+ unsigned int entry_id;
+ unsigned int i;
+ int count;
+ int ret;
+
+ count = of_property_count_elems_of_size(np, propname, sizeof(u32) * 3);
+ if (count < 0)
+ return count;
+
+ if (count > AX45MP_MAX_PMA_REGIONS)
+ return -EINVAL;
+
+ for (i = 0, entry_id = 0 ; entry_id < count ; i += 3, entry_id++) {
+ of_property_read_u32_index(np, propname, i, &start);
+ of_property_read_u32_index(np, propname, i + 1, &size);
+ of_property_read_u32_index(np, propname, i + 2, &flags);
+ ret = ax45mp_sbi_set_pma(start, size, flags, entry_id);
+ if (!ret)
+ pr_err("Failed to setup PMA region 0x%x - 0x%x flags: 0x%x",
+ start, start + size, flags);
+ }
+
+ return 0;
+}
+
+/* L2 Cache operations */
+static uint32_t ax45mp_cpu_get_mcache_ctl_status(void)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_ANDES, AX45MP_SBI_EXT_GET_MCACHE_CTL_STATUS,
+ 0, 0, 0, 0, 0, 0);
+ return ret.value;
+}
+
+static uint32_t ax45mp_cpu_get_micm_cfg_status(void)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_ANDES, AX45MP_SBI_EXT_GET_MICM_CTL_STATUS,
+ 0, 0, 0, 0, 0, 0);
+ return ret.value;
+}
+
+static uint32_t ax45mp_cpu_get_mdcm_cfg_status(void)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_ANDES, AX45MP_SBI_EXT_GET_MDCM_CTL_STATUS,
+ 0, 0, 0, 0, 0, 0);
+ return ret.value;
+}
+
+static uint32_t ax45mp_cpu_get_mmsc_cfg_status(void)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_ANDES, AX45MP_SBI_EXT_GET_MMSC_CTL_STATUS,
+ 0, 0, 0, 0, 0, 0);
+ return ret.value;
+}
+
+static uint32_t ax45mp_cpu_get_misa_cfg_status(void)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_ANDES, AX45MP_SBI_EXT_GET_MISA_CTL_STATUS,
+ 0, 0, 0, 0, 0, 0);
+ return ret.value;
+}
+
+static inline uint32_t ax45mp_cpu_l2c_get_cctl_status(void)
+{
+ return readl(ax45mp_priv->l2c_base + AX45MP_L2C_REG_STATUS_OFFSET);
+}
+
+static inline uint32_t ax45mp_cpu_l2c_ctl_status(void)
+{
+ return readl(ax45mp_priv->l2c_base + AX45MP_L2C_REG_CTL_OFFSET);
+}
+
+static bool ax45mp_cpu_cache_controlable(void)
+{
+ return (((ax45mp_cpu_get_micm_cfg_status() & AX45MP_MICM_CFG_ISZ_MASK) ||
+ (ax45mp_cpu_get_mdcm_cfg_status() & AX45MP_MDCM_CFG_DSZ_MASK)) &&
+ (ax45mp_cpu_get_misa_cfg_status() & AX45MP_MISA_20_MASK) &&
+ (ax45mp_cpu_get_mmsc_cfg_status() & AX45MP_MMSC_CFG_CCTLCSR_MASK) &&
+ (ax45mp_cpu_get_mcache_ctl_status() & AX45MP_MCACHE_CTL_CCTL_SUEN_MASK));
+}
+
+static void ax45mp_cpu_dcache_wb_range(void *start, void *end, int line_size)
+{
+ void __iomem *base = ax45mp_priv->l2c_base;
+ unsigned long pa;
+ int mhartid = 0;
+#ifdef CONFIG_SMP
+ mhartid = smp_processor_id();
+#endif
+
+ while (end > start) {
+ if (ax45mp_priv->ucctl_ok) {
+ csr_write(AX45MP_CCTL_REG_UCCTLBEGINADDR_NUM, start);
+ csr_write(AX45MP_CCTL_REG_UCCTLCOMMAND_NUM, AX45MP_CCTL_L1D_VA_WB);
+ }
+
+ if (ax45mp_priv->l2cache_enabled) {
+ pa = virt_to_phys(start);
+ writel(pa, base + AX45MP_L2C_REG_CN_ACC_OFFSET(mhartid));
+ writel(AX45MP_CCTL_L2_PA_WB,
+ base + AX45MP_L2C_REG_CN_CMD_OFFSET(mhartid));
+ while ((ax45mp_cpu_l2c_get_cctl_status() &
+ AX45MP_CCTL_L2_STATUS_CN_MASK(mhartid)) !=
+ AX45MP_CCTL_L2_STATUS_IDLE)
+ ;
+ }
+
+ start += line_size;
+ }
+}
+
+static void ax45mp_cpu_dcache_inval_range(void *start, void *end, int line_size)
+{
+ void __iomem *base = ax45mp_priv->l2c_base;
+ unsigned long pa;
+ int mhartid = 0;
+#ifdef CONFIG_SMP
+ mhartid = smp_processor_id();
+#endif
+
+ while (end > start) {
+ if (ax45mp_priv->ucctl_ok) {
+ csr_write(AX45MP_CCTL_REG_UCCTLBEGINADDR_NUM, start);
+ csr_write(AX45MP_CCTL_REG_UCCTLCOMMAND_NUM, AX45MP_CCTL_L1D_VA_INVAL);
+ }
+
+ if (ax45mp_priv->l2cache_enabled) {
+ pa = virt_to_phys(start);
+ writel(pa, base + AX45MP_L2C_REG_CN_ACC_OFFSET(mhartid));
+ writel(AX45MP_CCTL_L2_PA_INVAL,
+ base + AX45MP_L2C_REG_CN_CMD_OFFSET(mhartid));
+ while ((ax45mp_cpu_l2c_get_cctl_status() &
+ AX45MP_CCTL_L2_STATUS_CN_MASK(mhartid)) !=
+ AX45MP_CCTL_L2_STATUS_IDLE)
+ ;
+ }
+
+ start += line_size;
+ }
+}
+
+static void ax45mp_cpu_dma_inval_range(void *vaddr, size_t size)
+{
+ char cache_buf[2][AX45MP_MAX_CACHE_LINE_SIZE];
+ unsigned long start = (unsigned long)vaddr;
+ unsigned long end = start + size;
+ unsigned long old_start = start;
+ unsigned long old_end = end;
+ unsigned long line_size;
+ unsigned long flags;
+
+ if (static_branch_unlikely(&ax45mp_l2c_configured) && !ax45mp_priv)
+ return;
+
+ if (unlikely(start == end))
+ return;
+
+ line_size = ax45mp_priv->ax45mp_cache_line_size;
+
+ memset(&cache_buf, 0x0, sizeof(cache_buf));
+ start = start & (~(line_size - 1));
+ end = ((end + line_size - 1) & (~(line_size - 1)));
+
+ local_irq_save(flags);
+ if (unlikely(start != old_start))
+ memcpy(&cache_buf[0][0], (void *)start, line_size);
+
+ if (unlikely(end != old_end))
+ memcpy(&cache_buf[1][0], (void *)(old_end & (~(line_size - 1))), line_size);
+
+ ax45mp_cpu_dcache_inval_range(vaddr, (void *)end, line_size);
+
+ if (unlikely(start != old_start))
+ memcpy((void *)start, &cache_buf[0][0], (old_start & (line_size - 1)));
+
+ if (unlikely(end != old_end))
+ memcpy((void *)(old_end + 1),
+ &cache_buf[1][(old_end & (line_size - 1)) + 1],
+ end - old_end - 1);
+
+ local_irq_restore(flags);
+}
+
+static void ax45mp_cpu_dma_wb_range(void *vaddr, size_t size)
+{
+ unsigned long start = (unsigned long)vaddr;
+ unsigned long end = start + size;
+ unsigned long line_size;
+ unsigned long flags;
+
+ if (static_branch_unlikely(&ax45mp_l2c_configured) && !ax45mp_priv)
+ return;
+
+ line_size = ax45mp_priv->ax45mp_cache_line_size;
+ local_irq_save(flags);
+ start = start & (~(line_size - 1));
+ ax45mp_cpu_dcache_wb_range(vaddr, (void *)end, line_size);
+ local_irq_restore(flags);
+}
+
+void ax45mp_no_iocp_cmo(unsigned int cache_size, void *vaddr, size_t size, int dir, int ops)
+{
+ if (ops == NON_COHERENT_DMA_PREP)
+ return;
+
+ if (ops == NON_COHERENT_SYNC_DMA_FOR_DEVICE) {
+ switch (dir) {
+ case DMA_FROM_DEVICE:
+ ax45mp_cpu_dma_inval_range(vaddr, size);
+ break;
+ case DMA_TO_DEVICE:
+ case DMA_BIDIRECTIONAL:
+ ax45mp_cpu_dma_wb_range(vaddr, size);
+ break;
+ default:
+ break;
+ }
+ return;
+ }
+
+ /* op == NON_COHERENT_SYNC_DMA_FOR_CPU */
+ if (dir == DMA_BIDIRECTIONAL || dir == DMA_FROM_DEVICE)
+ ax45mp_cpu_dma_inval_range(vaddr, size);
+}
+EXPORT_SYMBOL(ax45mp_no_iocp_cmo);
+
+static int ax45mp_configure_l2_cache(struct device_node *np)
+{
+ int ret;
+
+ ret = of_property_read_u32(np, "cache-line-size", &ax45mp_priv->ax45mp_cache_line_size);
+ if (ret) {
+ pr_err("Failed to get cache-line-size defaulting to 64 bytes\n");
+ ax45mp_priv->ax45mp_cache_line_size = SZ_64;
+ }
+
+ if (ax45mp_priv->ax45mp_cache_line_size != SZ_64) {
+ pr_err("Expected cache-line-size to 64 bytes (found:%u). Defaulting to 64 bytes\n",
+ ax45mp_priv->ax45mp_cache_line_size);
+ ax45mp_priv->ax45mp_cache_line_size = SZ_64;
+ }
+
+ ax45mp_priv->ucctl_ok = ax45mp_cpu_cache_controlable();
+ ax45mp_priv->l2cache_enabled = ax45mp_cpu_l2c_ctl_status() & AX45MP_L2_CACHE_CTL_CEN_MASK;
+
+ return 0;
+}
+
+static int ax45mp_l2c_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ ax45mp_priv = devm_kzalloc(&pdev->dev, sizeof(*ax45mp_priv), GFP_KERNEL);
+ if (!ax45mp_priv)
+ return -ENOMEM;
+
+ ax45mp_priv->l2c_base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL);
+ if (!ax45mp_priv->l2c_base) {
+ ret = -ENOMEM;
+ goto l2c_err;
+ }
+
+ ret = ax45mp_configure_l2_cache(np);
+ if (ret)
+ goto l2c_err;
+
+ ret = ax45mp_configure_pma_regions(np);
+ if (ret)
+ goto l2c_err;
+
+ static_branch_disable(&ax45mp_l2c_configured);
+
+ return 0;
+
+l2c_err:
+ devm_kfree(&pdev->dev, ax45mp_priv);
+ ax45mp_priv = NULL;
+ return ret;
+}
+
+static const struct of_device_id ax45mp_cache_ids[] = {
+ { .compatible = "andestech,ax45mp-cache" },
+ { /* sentinel */ }
+};
+
+static struct platform_driver ax45mp_l2c_driver = {
+ .driver = {
+ .name = "ax45mp-l2c",
+ .of_match_table = ax45mp_cache_ids,
+ },
+ .probe = ax45mp_l2c_probe,
+};
+
+static int __init ax45mp_cache_init(void)
+{
+ static_branch_enable(&ax45mp_l2c_configured);
+ return platform_driver_register(&ax45mp_l2c_driver);
+}
+arch_initcall(ax45mp_cache_init);
+
+MODULE_AUTHOR("Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>");
+MODULE_DESCRIPTION("Andes AX45MP L2 cache driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/soc/renesas/rzfive/ax45mp_sbi.h b/drivers/soc/renesas/rzfive/ax45mp_sbi.h
new file mode 100644
index 000000000000..1604874954d0
--- /dev/null
+++ b/drivers/soc/renesas/rzfive/ax45mp_sbi.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __AX45MP_SBI_H
+#define __AX45MP_SBI_H
+
+#define SBI_EXT_ANDES 0x0900031E
+
+enum ax45mp_sbi_ext_fid {
+ AX45MP_SBI_EXT_GET_MCACHE_CTL_STATUS = 0,
+ AX45MP_SBI_EXT_GET_MMISC_CTL_STATUS,
+ AX45MP_SBI_EXT_SET_MCACHE_CTL,
+ AX45MP_SBI_EXT_SET_MMISC_CTL,
+ AX45MP_SBI_EXT_ICACHE_OP,
+ AX45MP_SBI_EXT_DCACHE_OP,
+ AX45MP_SBI_EXT_L1CACHE_I_PREFETCH,
+ AX45MP_SBI_EXT_L1CACHE_D_PREFETCH,
+ AX45MP_SBI_EXT_NON_BLOCKING_LOAD_STORE,
+ AX45MP_SBI_EXT_WRITE_AROUND,
+ AX45MP_SBI_EXT_SET_PMA,
+ AX45MP_SBI_EXT_FREE_PMA,
+ AX45MP_SBI_EXT_PROBE_PMA,
+ AX45MP_SBI_EXT_DCACHE_WBINVAL_ALL,
+ AX45MP_SBI_EXT_GET_MICM_CTL_STATUS,
+ AX45MP_SBI_EXT_GET_MDCM_CTL_STATUS,
+ AX45MP_SBI_EXT_GET_MMSC_CTL_STATUS,
+ AX45MP_SBI_EXT_GET_MISA_CTL_STATUS,
+};
+
+#endif
--
2.25.1
More information about the linux-riscv
mailing list