drivers/staging/media/atomisp/pci/sh_css_mmu.c

Source file repositories/reference/linux-study-clean/drivers/staging/media/atomisp/pci/sh_css_mmu.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/media/atomisp/pci/sh_css_mmu.c
Extension
.c
Size
1332 bytes
Lines
52
Domain
Driver Families
Bucket
drivers/staging
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Support for Intel Camera Imaging ISP subsystem.
 * Copyright (c) 2015, Intel Corporation.
 */

#include "ia_css_mmu.h"
#include "ia_css_mmu_private.h"
#include <ia_css_debug.h>
#include "sh_css_sp.h"
#include "sh_css_firmware.h"
#include "sp.h"
#include "mmu_device.h"

void
ia_css_mmu_invalidate_cache(void)
{
	const struct ia_css_fw_info *fw = &sh_css_sp_fw;
	unsigned int HIVE_ADDR_ia_css_dmaproxy_sp_invalidate_tlb;

	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE,
			    "ia_css_mmu_invalidate_cache() enter\n");

	/* if the SP is not running we should not access its dmem */
	if (sh_css_sp_is_running()) {
		HIVE_ADDR_ia_css_dmaproxy_sp_invalidate_tlb = fw->info.sp.invalidate_tlb;

		(void)HIVE_ADDR_ia_css_dmaproxy_sp_invalidate_tlb; /* Suppres warnings in CRUN */

		sp_dmem_store_uint32(SP0_ID,
				     (unsigned int)sp_address_of(ia_css_dmaproxy_sp_invalidate_tlb),
				     true);
	}
	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE,
			    "ia_css_mmu_invalidate_cache() leave\n");
}

void
sh_css_mmu_set_page_table_base_index(hrt_data base_index)
{
	int i;

	IA_CSS_ENTER_PRIVATE("base_index=0x%08x\n", base_index);
	for (i = 0; i < N_MMU_ID; i++) {
		mmu_ID_t mmu_id = i;

		mmu_set_page_table_base_index(mmu_id, base_index);
		mmu_invalidate_cache(mmu_id);
	}
	IA_CSS_LEAVE_PRIVATE("");
}

Annotation

Implementation Notes