smart-green-house/rtt-uart-nb/rt-thread/libcpu/arm/zynqmp-r5/cache.c

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2020-03-19 	  WangHuachen  first version
 */
#include <rthw.h>
#include <rtdef.h>

#include "xpseudo_asm_gcc.h"
#include "xreg_cortexr5.h"

#define IRQ_FIQ_MASK 0xC0	/* Mask IRQ and FIQ interrupts in cpsr */

typedef intptr_t INTPTR;
typedef rt_uint32_t u32;

#if defined (__GNUC__)
#define asm_inval_dc_line_mva_poc(param) __asm__ __volatile__("mcr " \
		XREG_CP15_INVAL_DC_LINE_MVA_POC :: "r" (param))

#define asm_clean_inval_dc_line_sw(param) __asm__ __volatile__("mcr " \
		XREG_CP15_CLEAN_INVAL_DC_LINE_SW :: "r" (param))

#define asm_clean_inval_dc_line_mva_poc(param) __asm__ __volatile__("mcr " \
		XREG_CP15_CLEAN_INVAL_DC_LINE_MVA_POC :: "r" (param))

#define asm_inval_ic_line_mva_pou(param) __asm__ __volatile__("mcr " \
		XREG_CP15_INVAL_IC_LINE_MVA_POU :: "r" (param))
#elif defined (__ICCARM__)
#define asm_inval_dc_line_mva_poc(param) __asm volatile("mcr " \
		XREG_CP15_INVAL_DC_LINE_MVA_POC :: "r" (param))

#define asm_clean_inval_dc_line_sw(param) __asm volatile("mcr " \
		XREG_CP15_CLEAN_INVAL_DC_LINE_SW :: "r" (param))

#define asm_clean_inval_dc_line_mva_poc(param) __asm volatile("mcr " \
		XREG_CP15_CLEAN_INVAL_DC_LINE_MVA_POC :: "r" (param))

#define asm_inval_ic_line_mva_pou(param) __asm volatile("mcr " \
		XREG_CP15_INVAL_IC_LINE_MVA_POU :: "r" (param))
#endif


void Xil_ICacheInvalidateRange(INTPTR adr, u32 len)
{
	u32 LocalAddr = adr;
	const u32 cacheline = 32U;
	u32 end;
	u32 currmask;

	currmask = mfcpsr();
	mtcpsr(currmask | IRQ_FIQ_MASK);
	if (len != 0x00000000U) {
		/* Back the starting address up to the start of a cache line
		 * perform cache operations until adr+len
		 */
		end = LocalAddr + len;
		LocalAddr = LocalAddr & ~(cacheline - 1U);

		/* Select cache L0 I-cache in CSSR */
		mtcp(XREG_CP15_CACHE_SIZE_SEL, 1U);

		while (LocalAddr < end) {

			/* Invalidate L1 I-cache line */
			asm_inval_ic_line_mva_pou(LocalAddr);

			LocalAddr += cacheline;
		}
	}

	/* Wait for invalidate to complete */
	dsb();
	mtcpsr(currmask);
}

void Xil_DCacheFlushLine(INTPTR adr)
{
	u32 currmask;

	currmask = mfcpsr();
	mtcpsr(currmask | IRQ_FIQ_MASK);

	mtcp(XREG_CP15_CACHE_SIZE_SEL, 0);

	mtcp(XREG_CP15_CLEAN_INVAL_DC_LINE_MVA_POC, (adr & (~0x1F)));

		/* Wait for flush to complete */
	dsb();
	mtcpsr(currmask);
}

void Xil_DCacheInvalidateRange(INTPTR adr, u32 len)
{
	const u32 cacheline = 32U;
	u32 end;
	u32 tempadr = adr;
	u32 tempend;
	u32 currmask;

	currmask = mfcpsr();
	mtcpsr(currmask | IRQ_FIQ_MASK);

	if (len != 0U) {
		end = tempadr + len;
		tempend = end;
		/* Select L1 Data cache in CSSR */
		mtcp(XREG_CP15_CACHE_SIZE_SEL, 0U);

		if ((tempadr & (cacheline-1U)) != 0U) {
			tempadr &= (~(cacheline - 1U));

			Xil_DCacheFlushLine(tempadr);
		}
		if ((tempend & (cacheline-1U)) != 0U) {
			tempend &= (~(cacheline - 1U));

			Xil_DCacheFlushLine(tempend);
		}

		while (tempadr < tempend) {

		/* Invalidate Data cache line */
		asm_inval_dc_line_mva_poc(tempadr);

		tempadr += cacheline;
		}
	}

	dsb();
	mtcpsr(currmask);
}

void Xil_DCacheFlushRange(INTPTR adr, u32 len)
{
	u32 LocalAddr = adr;
	const u32 cacheline = 32U;
	u32 end;
	u32 currmask;

	currmask = mfcpsr();
	mtcpsr(currmask | IRQ_FIQ_MASK);

	if (len != 0x00000000U) {
		/* Back the starting address up to the start of a cache line
		 * perform cache operations until adr+len
		 */
		end = LocalAddr + len;
		LocalAddr &= ~(cacheline - 1U);

		while (LocalAddr < end) {
			/* Flush Data cache line */
			asm_clean_inval_dc_line_mva_poc(LocalAddr);

			LocalAddr += cacheline;
		}
	}
	dsb();
	mtcpsr(currmask);
}

void rt_hw_cpu_icache_ops(int ops, void *addr, int size)
{
    if (ops == RT_HW_CACHE_INVALIDATE)
        Xil_ICacheInvalidateRange((INTPTR)addr, size);
}

void rt_hw_cpu_dcache_ops(int ops, void *addr, int size)
{
    if (ops == RT_HW_CACHE_FLUSH)
        Xil_DCacheFlushRange((intptr_t)addr, size);
    else if (ops == RT_HW_CACHE_INVALIDATE)
        Xil_DCacheInvalidateRange((intptr_t)addr, size);
}

rt_base_t rt_hw_cpu_icache_status(void)
{
	register u32 CtrlReg;
#if defined (__GNUC__)
	CtrlReg = mfcp(XREG_CP15_SYS_CONTROL);
#elif defined (__ICCARM__)
	 mfcp(XREG_CP15_SYS_CONTROL,CtrlReg);
#endif
	return CtrlReg & XREG_CP15_CONTROL_I_BIT;
}

rt_base_t rt_hw_cpu_dcache_status(void)
{
	register u32 CtrlReg;
#if defined (__GNUC__)
	CtrlReg = mfcp(XREG_CP15_SYS_CONTROL);
#elif defined (__ICCARM__)
	 mfcp(XREG_CP15_SYS_CONTROL,CtrlReg);
#endif
	return CtrlReg & XREG_CP15_CONTROL_C_BIT;
}