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Add cache clean/invalidate.

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This commit is contained in:
MasterPhi
2021-07-30 12:06:02 +02:00
parent 8b5625bf4e
commit c4cd36980d
1 changed files with 24 additions and 4 deletions
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28
src/portable/microchip/samx7x/dcd_samx7x.c
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@@ -94,6 +94,18 @@ static const tusb_desc_endpoint_t ep0_desc =
.wMaxPacketSize = { .size = CFG_TUD_ENDPOINT0_SIZE },
};
TU_ATTR_ALWAYS_INLINE static inline void CleanInValidateCache(uint32_t *addr, int32_t size)
{
if (SCB->CCR & SCB_CCR_DC_Msk)
{
SCB_CleanInvalidateDCache_by_Addr(addr, size);
}
else
{
__DSB();
__ISB();
}
}
//------------------------------------------------------------------
// Device API
//------------------------------------------------------------------
@@ -141,8 +153,6 @@ void dcd_connect(uint8_t rhport)
{
(void) rhport;
dcd_int_disable(rhport);
// Enable USB clock
PMC->PMC_PCER1 = 1 << (ID_USBHS - 32);
// Enable the USB controller in device mode
USBHS->USBHS_CTRL = USBHS_CTRL_UIMOD | USBHS_CTRL_USBE;
while (USBHS_SR_CLKUSABLE != (USBHS->USBHS_SR & USBHS_SR_CLKUSABLE));
@@ -602,6 +612,9 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
if (EP_DMA_SUPPORT(epnum) && total_bytes != 0)
{
// Force the CPU to flush the buffer. We increase the size by 32 because the call aligns the
// address to 32-byte boundaries.
CleanInValidateCache((uint32_t*) tu_align((uint32_t) buffer, 4), total_bytes + 31);
uint32_t udd_dma_ctrl = USBHS_DEVDMACONTROL_BUFF_LENGTH(total_bytes);
if (dir == TUSB_DIR_OUT)
{
@@ -679,16 +692,23 @@ bool dcd_edpt_xfer_fifo (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16
udd_dma_ctrl_wrap |= USBHS_DEVDMACONTROL_END_B_EN;
}
// Clean invalidate cache of linear part
CleanInValidateCache((uint32_t*) tu_align((uint32_t) info.ptr_lin, 4), info.len_lin + 31);
USBHS->UsbhsDevdma[epnum - 1].USBHS_DEVDMAADDRESS = (uint32_t)info.ptr_lin;
if (info.len_wrap)
{
// Clean invalidate cache of wrapped part
CleanInValidateCache((uint32_t*) tu_align((uint32_t) info.ptr_wrap, 4), info.len_wrap + 31);
dma_desc[epnum - 1].next_desc = 0;
dma_desc[epnum - 1].buff_addr = (uint32_t)info.ptr_wrap;
dma_desc[epnum - 1].chnl_ctrl =
udd_dma_ctrl_wrap | USBHS_DEVDMACONTROL_BUFF_LENGTH(info.len_wrap);
// Clean cache of wrapped DMA descriptor
CleanInValidateCache((uint32_t*)&dma_desc[epnum - 1], sizeof(dma_desc_t));
udd_dma_ctrl_lin |= USBHS_DEVDMASTATUS_DESC_LDST;
__DSB();
__ISB();
USBHS->UsbhsDevdma[epnum - 1].USBHS_DEVDMANXTDSC = (uint32_t)&dma_desc[epnum - 1];
} else {
udd_dma_ctrl_lin |= USBHS_DEVDMACONTROL_END_BUFFIT;