arch/mips/sgi-ip32/ip32-memory.c

Source file repositories/reference/linux-study-clean/arch/mips/sgi-ip32/ip32-memory.c

File Facts

System
Linux kernel
Corpus path
arch/mips/sgi-ip32/ip32-memory.c
Extension
.c
Size
1069 bytes
Lines
44
Domain
Architecture Layer
Bucket
arch/mips
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

#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/memblock.h>
#include <linux/mm.h>

#include <asm/ip32/crime.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/sgialib.h>

extern void crime_init(void);

void __init prom_meminit(void)
{
	u64 base, size;
	int bank;

	crime_init();

	for (bank=0; bank < CRIME_MAXBANKS; bank++) {
		u64 bankctl = crime->bank_ctrl[bank];
		base = (bankctl & CRIME_MEM_BANK_CONTROL_ADDR) << 25;
		if (bank != 0 && base == 0)
			continue;
		size = (bankctl & CRIME_MEM_BANK_CONTROL_SDRAM_SIZE) ? 128 : 32;
		size <<= 20;
		if (base + size > (256 << 20))
			base += CRIME_HI_MEM_BASE;

		printk("CRIME MC: bank %u base 0x%016Lx size %LuMiB\n",
			bank, base, size >> 20);
		memblock_add(base, size);
	}
}

Annotation

Implementation Notes