drivers/accel/habanalabs/include/hw_ip/mmu/mmu_general.h

Source file repositories/reference/linux-study-clean/drivers/accel/habanalabs/include/hw_ip/mmu/mmu_general.h

File Facts

System
Linux kernel
Corpus path
drivers/accel/habanalabs/include/hw_ip/mmu/mmu_general.h
Extension
.h
Size
1527 bytes
Lines
60
Domain
Driver Families
Bucket
drivers/accel
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

#ifndef INCLUDE_MMU_GENERAL_H_
#define INCLUDE_MMU_GENERAL_H_

#define PAGE_SHIFT_4KB			12
#define PAGE_SHIFT_64KB			16
#define PAGE_SHIFT_2MB			21
#define PAGE_SHIFT_16MB			24
#define PAGE_SHIFT_64MB			26
#define PAGE_SHIFT_1GB			30
#define PAGE_SIZE_4KB			_BITUL(PAGE_SHIFT_4KB)
#define PAGE_SIZE_64KB			_BITUL(PAGE_SHIFT_64KB)
#define PAGE_SIZE_2MB			_BITUL(PAGE_SHIFT_2MB)
#define PAGE_SIZE_16MB			_BITUL(PAGE_SHIFT_16MB)
#define PAGE_SIZE_64MB			_BITUL(PAGE_SHIFT_64MB)
#define PAGE_SIZE_1GB			_BITUL(PAGE_SHIFT_1GB)

#define PAGE_PRESENT_MASK		0x0000000000001ull
#define SWAP_OUT_MASK			0x0000000000004ull
#define LAST_MASK			0x0000000000800ull
#define FLAGS_MASK			0x0000000000FFFull

#define MMU_ARCH_3_HOPS			3
#define MMU_ARCH_4_HOPS			4
#define MMU_ARCH_5_HOPS			5
#define MMU_ARCH_6_HOPS			6

#define HOP_PHYS_ADDR_MASK		(~FLAGS_MASK)

#define HL_PTE_SIZE			sizeof(u64)

/* definitions for HOP with 512 PTE entries */
#define HOP_PTE_ENTRIES_512		512
#define HOP_TABLE_SIZE_512_PTE		(HOP_PTE_ENTRIES_512 * HL_PTE_SIZE)
#define HOP0_512_PTE_TABLES_TOTAL_SIZE	(HOP_TABLE_SIZE_512_PTE * MAX_ASID)

#define MMU_HOP0_PA43_12_SHIFT		12
#define MMU_HOP0_PA49_44_SHIFT		(12 + 32)
#define MMU_HOP0_PA63_44_SHIFT		(12 + 32)

#define MMU_CONFIG_TIMEOUT_USEC		2000 /* 2 ms */

enum mmu_hop_num {
	MMU_HOP0,
	MMU_HOP1,
	MMU_HOP2,
	MMU_HOP3,
	MMU_HOP4,
	MMU_HOP5,
	MMU_HOP_MAX,
};

#endif /* INCLUDE_MMU_GENERAL_H_ */

Annotation

Implementation Notes