commit 2b8dc36b4c515979da330a96d9fcc9bbbe5385fa
author Leo Yu-Chi Liang <ycliang@andestech.com> Tue May 14 17:50:11 2024 +0800
committer Leo Yu-Chi Liang <ycliang@andestech.com> Tue May 14 18:50:47 2024 +0800
tree d3f888d81e456db014b5dc0814cd67fd948726cc
parent 409259e9cff9a9fcae0f2fa0c4ae3ba16682cdda

andes: Unify naming policy for Andes related source

Signed-off-by: Leo Yu-Chi Liang <ycliang@andestech.com>

drivers/cache/cache-andes-l2.c

diff --git a/drivers/cache/cache-andes-l2.c b/drivers/cache/cache-andes-l2.c
new file mode 100644
index 0000000..7de8f16
--- /dev/null
+++ b/drivers/cache/cache-andes-l2.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ */
+
+#include <command.h>
+#include <cache.h>
+#include <dm.h>
+#include <hang.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <dm/ofnode.h>
+#include <linux/bitops.h>
+
+struct l2cache {
+	volatile u64	configure;
+	volatile u64	control;
+	volatile u64	hpm0;
+	volatile u64	hpm1;
+	volatile u64	hpm2;
+	volatile u64	hpm3;
+	volatile u64	error_status;
+	volatile u64	ecc_error;
+	volatile u64	cctl_command0;
+	volatile u64	cctl_access_line0;
+	volatile u64	cctl_command1;
+	volatile u64	cctl_access_line1;
+	volatile u64	cctl_command2;
+	volatile u64	cctl_access_line2;
+	volatile u64	cctl_command3;
+	volatile u64	cctl_access_line4;
+	volatile u64	cctl_status;
+};
+
+/* Configuration register */
+#define MEM_MAP_OFF	20
+#define MEM_MAP_MSK	BIT(MEM_MAP_OFF)
+/* offset of v0 memory map (Gen1) */
+static u32 cmd_stride = 0x10;
+static u32 status_stride = 0x0;
+static u32 status_bit_offset = 0x4;
+
+/* Control Register */
+#define L2_ENABLE	0x1
+/* prefetch */
+#define IPREPETCH_OFF	3
+#define DPREPETCH_OFF	5
+#define IPREPETCH_MSK	(3 << IPREPETCH_OFF)
+#define DPREPETCH_MSK	(3 << DPREPETCH_OFF)
+/* tag ram */
+#define TRAMOCTL_OFF	8
+#define TRAMICTL_OFF	10
+#define TRAMOCTL_MSK	(3 << TRAMOCTL_OFF)
+#define TRAMICTL_MSK	BIT(TRAMICTL_OFF)
+/* data ram */
+#define DRAMOCTL_OFF	11
+#define DRAMICTL_OFF	13
+#define DRAMOCTL_MSK	(3 << DRAMOCTL_OFF)
+#define DRAMICTL_MSK	BIT(DRAMICTL_OFF)
+
+/* CCTL Command Register */
+#define CCTL_CMD_REG(base, hart)	((ulong)(base) + 0x40 + (hart) * (cmd_stride))
+#define L2_WBINVAL_ALL	0x12
+
+/* CCTL Status Register */
+#define CCTL_STATUS_REG(base, hart)	((ulong)(base) + 0x80 + (hart) * (status_stride))
+#define CCTL_STATUS_MSK(hart)		(0xf << ((hart) * (status_bit_offset)))
+#define CCTL_STATUS_IDLE(hart)		(0 << ((hart) * (status_bit_offset)))
+#define CCTL_STATUS_PROCESS(hart)	(1 << ((hart) * (status_bit_offset)))
+#define CCTL_STATUS_ILLEGAL(hart)	(2 << ((hart) * (status_bit_offset)))
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct andes_l2_plat {
+	struct l2cache	*regs;
+	u32		iprefetch;
+	u32		dprefetch;
+	u32		tram_ctl[2];
+	u32		dram_ctl[2];
+};
+
+static int andes_l2_enable(struct udevice *dev)
+{
+	struct andes_l2_plat *plat = dev_get_plat(dev);
+	volatile struct l2cache *regs = plat->regs;
+
+	if (regs)
+		setbits_le32(&regs->control, L2_ENABLE);
+
+	return 0;
+}
+
+static int andes_l2_disable(struct udevice *dev)
+{
+	struct andes_l2_plat *plat = dev_get_plat(dev);
+	volatile struct l2cache *regs = plat->regs;
+	u8 hart = gd->arch.boot_hart;
+	void __iomem *cctlcmd = (void __iomem *)CCTL_CMD_REG(regs, hart);
+
+	if ((regs) && (readl(&regs->control) & L2_ENABLE)) {
+		writel(L2_WBINVAL_ALL, cctlcmd);
+
+		while ((readl(&regs->cctl_status) & CCTL_STATUS_MSK(hart))) {
+			if ((readl(&regs->cctl_status) & CCTL_STATUS_ILLEGAL(hart))) {
+				printf("L2 flush illegal! hanging...");
+				hang();
+			}
+		}
+		clrbits_le32(&regs->control, L2_ENABLE);
+	}
+
+	return 0;
+}
+
+static int andes_l2_of_to_plat(struct udevice *dev)
+{
+	struct andes_l2_plat *plat = dev_get_plat(dev);
+	struct l2cache *regs;
+
+	regs = dev_read_addr_ptr(dev);
+	plat->regs = regs;
+
+	plat->iprefetch = -EINVAL;
+	plat->dprefetch = -EINVAL;
+	plat->tram_ctl[0] = -EINVAL;
+	plat->dram_ctl[0] = -EINVAL;
+
+	/* Instruction and data fetch prefetch depth */
+	dev_read_u32(dev, "andes,inst-prefetch", &plat->iprefetch);
+	dev_read_u32(dev, "andes,data-prefetch", &plat->dprefetch);
+
+	/* Set tag RAM and data RAM setup and output cycle */
+	dev_read_u32_array(dev, "andes,tag-ram-ctl", plat->tram_ctl, 2);
+	dev_read_u32_array(dev, "andes,data-ram-ctl", plat->dram_ctl, 2);
+
+	return 0;
+}
+
+static int andes_l2_probe(struct udevice *dev)
+{
+	struct andes_l2_plat *plat = dev_get_plat(dev);
+	struct l2cache *regs = plat->regs;
+	u32 cfg_val, ctl_val;
+
+	cfg_val = readl(&regs->configure);
+	ctl_val = readl(&regs->control);
+
+	/* If true, v1 memory map (Gen2) */
+	if (cfg_val & MEM_MAP_MSK) {
+		cmd_stride = 0x1000;
+		status_stride = 0x1000;
+		status_bit_offset = 0x0;
+	}
+
+	ctl_val |= L2_ENABLE;
+
+	if (plat->iprefetch != -EINVAL) {
+		ctl_val &= ~(IPREPETCH_MSK);
+		ctl_val |= (plat->iprefetch << IPREPETCH_OFF);
+	}
+
+	if (plat->dprefetch != -EINVAL) {
+		ctl_val &= ~(DPREPETCH_MSK);
+		ctl_val |= (plat->dprefetch << DPREPETCH_OFF);
+	}
+
+	if (plat->tram_ctl[0] != -EINVAL) {
+		ctl_val &= ~(TRAMOCTL_MSK | TRAMICTL_MSK);
+		ctl_val |= plat->tram_ctl[0] << TRAMOCTL_OFF;
+		ctl_val |= plat->tram_ctl[1] << TRAMICTL_OFF;
+	}
+
+	if (plat->dram_ctl[0] != -EINVAL) {
+		ctl_val &= ~(DRAMOCTL_MSK | DRAMICTL_MSK);
+		ctl_val |= plat->dram_ctl[0] << DRAMOCTL_OFF;
+		ctl_val |= plat->dram_ctl[1] << DRAMICTL_OFF;
+	}
+
+	writel(ctl_val, &regs->control);
+
+	return 0;
+}
+
+static const struct udevice_id andes_l2_cache_ids[] = {
+	{ .compatible = "cache" },
+	{}
+};
+
+static const struct cache_ops andes_l2_cache_ops = {
+	.enable		= andes_l2_enable,
+	.disable	= andes_l2_disable,
+};
+
+U_BOOT_DRIVER(andes_l2_cache) = {
+	.name   = "andes_l2_cache",
+	.id     = UCLASS_CACHE,
+	.of_match = andes_l2_cache_ids,
+	.of_to_plat = andes_l2_of_to_plat,
+	.probe	= andes_l2_probe,
+	.plat_auto	= sizeof(struct andes_l2_plat),
+	.ops = &andes_l2_cache_ops,
+	.flags  = DM_FLAG_PRE_RELOC,
+};