arch/mips/mti-malta/malta-setup.c

Source file repositories/reference/linux-study-clean/arch/mips/mti-malta/malta-setup.c

File Facts

System
Linux kernel
Corpus path
arch/mips/mti-malta/malta-setup.c
Extension
.c
Size
5881 bytes
Lines
238
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

if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
			BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
			pr_info("Enabled Bonito CPU coherency\n");
			dma_default_coherent = true;
		}
		if (strstr(fw_getcmdline(), "iobcuncached")) {
			BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
			BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
				~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
				  BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
			pr_info("Disabled Bonito IOBC coherency\n");
		} else {
			BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
			BONITO_PCIMEMBASECFG |=
				(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
				 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
			pr_info("Enabled Bonito IOBC coherency\n");
		}
	} else if (mips_cps_numiocu(0) != 0) {
		/* Nothing special needs to be done to enable coherency */
		pr_info("CMP IOCU detected\n");
		cfg = __raw_readl((u32 *)CKSEG1ADDR(ROCIT_CONFIG_GEN0));
		if (cfg & ROCIT_CONFIG_GEN0_PCI_IOCU)
			dma_default_coherent = true;
		else
			pr_crit("IOCU OPERATION DISABLED BY SWITCH - DEFAULTING TO SW IO COHERENCY\n");
	}

	if (dma_default_coherent)
		pr_info("Hardware DMA cache coherency enabled\n");
	else
		pr_info("Software DMA cache coherency enabled\n");
}

static void __init pci_clock_check(void)
{
	unsigned int __iomem *jmpr_p =
		(unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
	int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
	static const int pciclocks[] __initconst = {
		33, 20, 25, 30, 12, 16, 37, 10
	};
	int pciclock = pciclocks[jmpr];
	char *optptr, *argptr = fw_getcmdline();

	/*
	 * If user passed a pci_clock= option, don't tack on another one
	 */
	optptr = strstr(argptr, "pci_clock=");
	if (optptr && (optptr == argptr || optptr[-1] == ' '))
		return;

	if (pciclock != 33) {
		pr_warn("WARNING: PCI clock is %dMHz, setting pci_clock\n",
			pciclock);
		argptr += strlen(argptr);
		sprintf(argptr, " pci_clock=%d", pciclock);
		if (pciclock < 20 || pciclock > 66)
			pr_warn("WARNING: IDE timing calculations will be "
			        "incorrect\n");
	}
}

#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
static void __init screen_info_setup(void)
{
	static struct screen_info si = {
		.orig_x = 0,
		.orig_y = 25,
		.ext_mem_k = 0,
		.orig_video_page = 0,
		.orig_video_mode = 0,
		.orig_video_cols = 80,
		.unused2 = 0,
		.orig_video_ega_bx = 0,
		.unused3 = 0,
		.orig_video_lines = 25,
		.orig_video_isVGA = VIDEO_TYPE_VGAC,
		.orig_video_points = 16
	};

	vgacon_register_screen(&si);
}
#endif

static void __init bonito_quirks_setup(void)
{
	char *argptr;

	argptr = fw_getcmdline();

Annotation

Implementation Notes