[参考译文] TDA4VM：TDA4VM -如何在 R5F 内核上配置 RAT

您好！

有关 RAT 配置、请参阅以下代码片段。 我添加了汇编版本、GEL 文件版本以及 c 代码版本。

请注意、不同 R5F 内核的 RAT 模块不同、因此您需要从同一内核执行 RAT 配置。

请注意、MCU R5和主 R5s 的 RAT 基址不同。 0x40F90000与0x0FF90000间的关系。

您能否为 PCIe 问题创建另一个主题？ 我们将请我们的 PCIe 专家来解决这一问题。 如果您发现 RAT 配置有问题、我们可以在该主题上继续。

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;
; ======== ratConf.asm ========
; Sets the RAT for the main domain to map 40-bit ocmram address to 32-bit space
;
    .text
    .sect   ".ratConf"
;==============================================================================
;   void ratConf( void )
;==============================================================================
    .global ti_sysbios_family_arm_v7r_keystone3_Hwi_vectors

    .global ratConf

ratConf:
        .asmfunc
        push.w  {r0, r1, r5, r7}
        movw    r0, #0x0040
        movt    r0, #0x0FF9
        movw    r1, #0x0013
        movt    r1, #0x8000
        str     r1, [r0]

        movw    r1, #0x0000
        movt    r1, #0xD000
        str     r1, [r0, #0x4]

        movw    r1, #0x0000
        movt    r1, #0x0200
        str     r1, [r0, #0x8]

        movw    r1, #0x004F
        movt    r1, #0x0000
        str     r1, [r0, #0xc]
        pop.w   {r0, r1, r5, r7}

        beq     exit
exit:
        bx      lr
        .endasmfunc

        .end

等效 GEL 代码为：

hotmenu Configure_RAT_50000000(){
        // region 1
                GEL_TextOut( "Mapping MAIN OCM @ 0x4F_0200_0000 to 0xD000_0000\n");
        *(unsigned int *)(0x0FF90000 + 0x44) = 0xD0000000;  //IN ADDRESS
        *(unsigned int *)(0x0FF90000 + 0x48) = 0x02000000;  //OUT ADDRESS
        *(unsigned int *)(0x0FF90000 + 0x4C) = 0x0000004F;  //Upper 16 bits of the real physical address.
        *(unsigned int *)(0x0FF90000 + 0x40) = 0x80000013;
}

相关 C 代码：

/* Check this header file for more info */
#include <ti/csl/csl_rat.h>
...
...
...
#if defined(SOC_J721E) && defined(MCU1_0)
#define RAT_CFG_BASE_ADDR CSL_MCU_ARMSS_RAT_CFG_BASE
#if defined(SOC_J721E) && defined(MCU2_0)
#define RAT_CFG_BASE_ADDR CSL_ARMSS_RAT_CFG_BASE
#endif
...
...
...
void ratConf(void)
{
    CSL_RatTranslationCfgInfo translationCfg;
	
	/* Add RAT configuration to access address > 32bit address range */
	
	/* Translated address returned on a successful match */
	translationCfg.translatedAddress    = ADDR_GREATER_THAN_32_BIT;
	/* Size of region in Bytes */
	translationCfg.sizeInBytes          = SIZE_IN_BYTES;
	/* 32-bit base address used in the address comparison */
	translationCfg.baseAddress          = ADDR_32_BIT;

	/* Set up RAT translation */
	bool result = CSL_ratConfigRegionTranslation((CSL_ratRegs *)RAT_CFG_BASE_ADDR,
												0U,
												&translationCfg);
	if (result == false)
	{
		sbl_puts("App: CSL_ratConfigRegionTranslation Failed! \n");
	}
	else
	{
		sbl_puts("App: CSL_ratConfigRegionTranslation Successful! \n");
	}
}

此致、

Karan