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bsp: r5: added MPU Region setting API with size

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This patch modifies xil_mpu.c to add the API Xil_SetMPURegion
which provide the settings for a MPU region with size

Signed-off-by: Kinjal Pravinbhai Patel <patelki@xilinx.com>
This commit is contained in:
Kinjal Pravinbhai Patel 2015-06-19 15:58:51 +05:30 • committed by Nava kishore Manne
parent 42bc9f3698
commit 133156ba96
2 changed files with 73 additions and 9 deletions
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81
lib/bsp/standalone/src/cortexr5/xil_mpu.c
View file

@ -65,6 +65,40 @@
/************************** Variable Definitions *****************************/
static const struct {
u64 size;
unsigned int encoding;
}region_size[] = {
{ 0x20, REGION_32B },
{ 0x40, REGION_64B },
{ 0x80, REGION_128B },
{ 0x100, REGION_256B },
{ 0x200, REGION_512B },
{ 0x400, REGION_1K },
{ 0x800, REGION_2K },
{ 0x1000, REGION_4K },
{ 0x2000, REGION_8K },
{ 0x4000, REGION_16K },
{ 0x8000, REGION_32K },
{ 0x10000, REGION_64K },
{ 0x20000, REGION_128K },
{ 0x40000, REGION_256K },
{ 0x80000, REGION_512K },
{ 0x100000, REGION_1M },
{ 0x200000, REGION_2M },
{ 0x400000, REGION_4M },
{ 0x800000, REGION_8M },
{ 0x1000000, REGION_16M },
{ 0x2000000, REGION_32M },
{ 0x4000000, REGION_64M },
{ 0x8000000, REGION_128M },
{ 0x10000000, REGION_256M },
{ 0x20000000, REGION_512M },
{ 0x40000000, REGION_1G },
{ 0x80000000, REGION_2G },
{ 0x100000000, REGION_4G },
};
/************************** Function Prototypes ******************************/
/*****************************************************************************
@ -80,32 +114,61 @@
******************************************************************************/
void Xil_SetTlbAttributes(INTPTR addr, u32 attrib)
{
u32 Regionsize;
INTPTR Localaddr = addr;
Localaddr &= (~(0xFFFFFU));
/* Setting the MPU region with given attribute with 1MB size */
Xil_SetMPURegion(Localaddr, 0x100000, attrib);
}
/*****************************************************************************
*
* Set the memory attributes for a section of memory with starting address addr
* of the region size size and having attributes attrib
*
* @param addr is the address for which attributes are to be set.
* @param size is the size of the region.
* @param attrib specifies the attributes for that memory region.
* @return None.
*
*
******************************************************************************/
void Xil_SetMPURegion(INTPTR addr, u64 size, u32 attrib)
{
u32 Regionsize = 0;
INTPTR Localaddr = addr;
u32 NextAvailableMemRegion;
unsigned int i;
Localaddr &= (~(0xFFFFFU));
Xil_DCacheFlush();
Xil_ICacheInvalidate();
NextAvailableMemRegion = mfcp(XREG_CP15_MPU_MEMORY_REG_NUMBER);
NextAvailableMemRegion++;
if (NextAvailableMemRegion > 16) {
xdbg_printf(DEBUG, "No regions available\r\n");
return;
}
mtcp(XREG_CP15_MPU_MEMORY_REG_NUMBER,NextAvailableMemRegion);
isb();
Regionsize = REGION_1M<<1; /* region size is hardcoded to 1MB */
/* Lookup the size. */
for (i = 0; i < sizeof region_size / sizeof region_size[0]; i++) {
if (size <= region_size[i].size) {
Regionsize = region_size[i].encoding;
break;
}
}
Localaddr &= ~(region_size[i].size - 1);
Regionsize <<= 1;
Regionsize |= REGION_EN;
dsb();
mtcp(XREG_CP15_MPU_REG_BASEADDR,Localaddr); /* Set base address of a region */
mtcp(XREG_CP15_MPU_REG_ACCESS_CTRL,attrib); /* Set the control attribute */
mtcp(XREG_CP15_MPU_REG_SIZE_EN,Regionsize); /* set the region size and enable it*/
mtcp(XREG_CP15_MPU_REG_BASEADDR, Localaddr); /* Set base address of a region */
mtcp(XREG_CP15_MPU_REG_ACCESS_CTRL, attrib); /* Set the control attribute */
mtcp(XREG_CP15_MPU_REG_SIZE_EN, Regionsize); /* set the region size and enable it*/
dsb();
isb();
}
/*****************************************************************************
*
* Enable MPU for Cortex R5 processor. This function invalidates I cache and

1
lib/bsp/standalone/src/cortexr5/xil_mpu.h
View file

@ -71,6 +71,7 @@ extern "C" {
void Xil_SetTlbAttributes(INTPTR Addr, u32 attrib);
void Xil_EnableMPU(void);
void Xil_DisableMPU(void);
void Xil_SetMPURegion(INTPTR addr, u64 size, u32 attrib);
#ifdef __cplusplus
}