arch/powerpc/include/asm/prom.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/prom.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/prom.h
Extension
.h
Size
7272 bytes
Lines
183
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct boot_param_header {
	__be32	magic;			/* magic word OF_DT_HEADER */
	__be32	totalsize;		/* total size of DT block */
	__be32	off_dt_struct;		/* offset to structure */
	__be32	off_dt_strings;		/* offset to strings */
	__be32	off_mem_rsvmap;		/* offset to memory reserve map */
	__be32	version;		/* format version */
	__be32	last_comp_version;	/* last compatible version */
	/* version 2 fields below */
	__be32	boot_cpuid_phys;	/* Physical CPU id we're booting on */
	/* version 3 fields below */
	__be32	dt_strings_size;	/* size of the DT strings block */
	/* version 17 fields below */
	__be32	dt_struct_size;		/* size of the DT structure block */
};

/*
 * OF address retreival & translation
 */

/* Parse the ibm,dma-window property of an OF node into the busno, phys and
 * size parameters.
 */
void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window,
			 unsigned long *busno, unsigned long *phys,
			 unsigned long *size);

extern void of_instantiate_rtc(void);

extern int of_get_ibm_chip_id(struct device_node *np);

struct of_drc_info {
	char *drc_type;
	char *drc_name_prefix;
	u32 drc_index_start;
	u32 drc_name_suffix_start;
	u32 num_sequential_elems;
	u32 sequential_inc;
	u32 drc_power_domain;
	u32 last_drc_index;
};

extern int of_read_drc_info_cell(struct property **prop,
			const __be32 **curval, struct of_drc_info *data);

extern unsigned int boot_cpu_node_count;

/*
 * There are two methods for telling firmware what our capabilities are.
 * Newer machines have an "ibm,client-architecture-support" method on the
 * root node.  For older machines, we have to call the "process-elf-header"
 * method in the /packages/elf-loader node, passing it a fake 32-bit
 * ELF header containing a couple of PT_NOTE sections that contain
 * structures that contain various information.
 */

/* New method - extensible architecture description vector. */

/* Option vector bits - generic bits in byte 1 */
#define OV_IGNORE		0x80	/* ignore this vector */
#define OV_CESSATION_POLICY	0x40	/* halt if unsupported option present*/

/* Option vector 1: processor architectures supported */
#define OV1_PPC_2_00		0x80	/* set if we support PowerPC 2.00 */
#define OV1_PPC_2_01		0x40	/* set if we support PowerPC 2.01 */
#define OV1_PPC_2_02		0x20	/* set if we support PowerPC 2.02 */
#define OV1_PPC_2_03		0x10	/* set if we support PowerPC 2.03 */
#define OV1_PPC_2_04		0x08	/* set if we support PowerPC 2.04 */
#define OV1_PPC_2_05		0x04	/* set if we support PowerPC 2.05 */
#define OV1_PPC_2_06		0x02	/* set if we support PowerPC 2.06 */
#define OV1_PPC_2_07		0x01	/* set if we support PowerPC 2.07 */

#define OV1_PPC_3_00		0x80	/* set if we support PowerPC 3.00 */
#define OV1_PPC_3_1			0x40	/* set if we support PowerPC 3.1 */

/* Option vector 2: Open Firmware options supported */
#define OV2_REAL_MODE		0x20	/* set if we want OF in real mode */

/* Option vector 3: processor options supported */
#define OV3_FP			0x80	/* floating point */
#define OV3_VMX			0x40	/* VMX/Altivec */
#define OV3_DFP			0x20	/* decimal FP */

/* Option vector 4: IBM PAPR implementation */
#define OV4_MIN_ENT_CAP		0x01	/* minimum VP entitled capacity */

/* Option vector 5: PAPR/OF options supported
 * These bits are also used in firmware_has_feature() to validate
 * the capabilities reported for vector 5 in the device tree so we
 * encode the vector index in the define and use the OV5_FEAT()

Annotation

Implementation Notes