GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (c) Copyright 2010-2017 Xilinx, Inc. All rights reserved.
+ * (c) Copyright 2016 Topic Embedded Products.
+ */
+
+#include <asm/io.h>
+#include <asm/spl.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/ps7_init_gpl.h>
+
+__weak int ps7_init(void)
+{
+	/*
+	 * This function is overridden by the one in
+	 * board/xilinx/zynq/(platform)/ps7_init_gpl.c, if it exists.
+	 */
+	return 0;
+}
+
+__weak int ps7_post_config(void)
+{
+	/*
+	 * This function is overridden by the one in
+	 * board/xilinx/zynq/(platform)/ps7_init_gpl.c, if it exists.
+	 */
+	return 0;
+}
+
+/* For delay calculation using global registers*/
+#define SCU_GLOBAL_TIMER_COUNT_L32	0xF8F00200
+#define SCU_GLOBAL_TIMER_COUNT_U32	0xF8F00204
+#define SCU_GLOBAL_TIMER_CONTROL	0xF8F00208
+#define SCU_GLOBAL_TIMER_AUTO_INC	0xF8F00218
+#define APU_FREQ  666666666
+
+#define PS7_MASK_POLL_TIME 100000000
+
+/* IO accessors. No memory barriers desired. */
+static inline void iowrite(unsigned long val, unsigned long addr)
+{
+	__raw_writel(val, addr);
+}
+
+static inline unsigned long ioread(unsigned long addr)
+{
+	return __raw_readl(addr);
+}
+
+/* start timer */
+static void perf_start_clock(void)
+{
+	iowrite((1 << 0) | /* Timer Enable */
+		(1 << 3) | /* Auto-increment */
+		(0 << 8), /* Pre-scale */
+		SCU_GLOBAL_TIMER_CONTROL);
+}
+
+/* Compute mask for given delay in miliseconds*/
+static unsigned long get_number_of_cycles_for_delay(unsigned long delay)
+{
+	return (APU_FREQ / (2 * 1000)) * delay;
+}
+
+/* stop timer */
+static void perf_disable_clock(void)
+{
+	iowrite(0, SCU_GLOBAL_TIMER_CONTROL);
+}
+
+/* stop timer and reset timer count regs */
+static void perf_reset_clock(void)
+{
+	perf_disable_clock();
+	iowrite(0, SCU_GLOBAL_TIMER_COUNT_L32);
+	iowrite(0, SCU_GLOBAL_TIMER_COUNT_U32);
+}
+
+static void perf_reset_and_start_timer(void)
+{
+	perf_reset_clock();
+	perf_start_clock();
+}
+
+int __weak ps7_config(unsigned long *ps7_config_init)
+{
+	unsigned long *ptr = ps7_config_init;
+	unsigned long opcode;
+	unsigned long addr;
+	unsigned long val;
+	unsigned long mask;
+	unsigned int numargs;
+	int i;
+	unsigned long delay;
+
+	for (;;) {
+		opcode = ptr[0];
+		if (opcode == OPCODE_EXIT)
+			return PS7_INIT_SUCCESS;
+		addr = (opcode & OPCODE_ADDRESS_MASK);
+
+		switch (opcode & ~OPCODE_ADDRESS_MASK) {
+		case OPCODE_MASKWRITE:
+			numargs = 3;
+			mask = ptr[1];
+			val = ptr[2];
+			iowrite((ioread(addr) & ~mask) | (val & mask), addr);
+			break;
+
+		case OPCODE_WRITE:
+			numargs = 2;
+			val = ptr[1];
+			iowrite(val, addr);
+			break;
+
+		case OPCODE_MASKPOLL:
+			numargs = 2;
+			mask = ptr[1];
+			i = 0;
+			while (!(ioread(addr) & mask)) {
+				if (i == PS7_MASK_POLL_TIME)
+					return PS7_INIT_TIMEOUT;
+				i++;
+			}
+			break;
+
+		case OPCODE_MASKDELAY:
+			numargs = 2;
+			mask = ptr[1];
+			delay = get_number_of_cycles_for_delay(mask);
+			perf_reset_and_start_timer();
+			while (ioread(addr) < delay)
+				;
+			break;
+
+		default:
+			return PS7_INIT_CORRUPT;
+		}
+
+		ptr += numargs;
+	}
+}
+
+unsigned long __weak __maybe_unused ps7GetSiliconVersion(void)
+{
+	return zynq_get_silicon_version();
+}