Exemplo n.º 1
0
void __init early_setup(unsigned long dt_ptr)
{
	struct paca_struct *lpaca = get_paca();
	static struct machdep_calls **mach;

	/* Enable early debugging if any specified (see udbg.h) */
	udbg_early_init();

	DBG(" -> early_setup()\n");

	/*
	 * Do early initializations using the flattened device
	 * tree, like retreiving the physical memory map or
	 * calculating/retreiving the hash table size
	 */
	early_init_devtree(__va(dt_ptr));

	/*
	 * Iterate all ppc_md structures until we find the proper
	 * one for the current machine type
	 */
	DBG("Probing machine type for platform %x...\n", _machine);

	for (mach = machines; *mach; mach++) {
		if ((*mach)->probe(_machine))
			break;
	}
	/* What can we do if we didn't find ? */
	if (*mach == NULL) {
		DBG("No suitable machine found !\n");
		for (;;);
	}
	ppc_md = **mach;

#ifdef CONFIG_CRASH_DUMP
	kdump_setup();
#endif

	DBG("Found, Initializing memory management...\n");

	/*
	 * Initialize the MMU Hash table and create the linear mapping
	 * of memory. Has to be done before stab/slb initialization as
	 * this is currently where the page size encoding is obtained
	 */
	htab_initialize();

	/*
	 * Initialize stab / SLB management except on iSeries
	 */
	if (!firmware_has_feature(FW_FEATURE_ISERIES)) {
		if (cpu_has_feature(CPU_FTR_SLB))
			slb_initialize();
		else
			stab_initialize(lpaca->stab_real);
	}

	DBG(" <- early_setup()\n");
}
Exemplo n.º 2
0
void __init early_setup(unsigned long dt_ptr)
{
	/* Identify CPU type */
	identify_cpu(0, mfspr(SPRN_PVR));

	/* Assume we're on cpu 0 for now. Don't write to the paca yet! */
	setup_paca(0);

	/* Enable early debugging if any specified (see udbg.h) */
	udbg_early_init();

 	DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr);

	/*
	 * Do early initializations using the flattened device
	 * tree, like retreiving the physical memory map or
	 * calculating/retreiving the hash table size
	 */
	early_init_devtree(__va(dt_ptr));

	/* Now we know the logical id of our boot cpu, setup the paca. */
	setup_paca(boot_cpuid);

	/* Fix up paca fields required for the boot cpu */
	get_paca()->cpu_start = 1;
	get_paca()->stab_real = __pa((u64)&initial_stab);
	get_paca()->stab_addr = (u64)&initial_stab;

	/* Probe the machine type */
	probe_machine();

	setup_kdump_trampoline();

	DBG("Found, Initializing memory management...\n");

	/*
	 * Initialize the MMU Hash table and create the linear mapping
	 * of memory. Has to be done before stab/slb initialization as
	 * this is currently where the page size encoding is obtained
	 */
	htab_initialize();

	/*
	 * Initialize stab / SLB management except on iSeries
	 */
	if (cpu_has_feature(CPU_FTR_SLB))
		slb_initialize();
	else if (!firmware_has_feature(FW_FEATURE_ISERIES))
		stab_initialize(get_paca()->stab_real);

	DBG(" <- early_setup()\n");
}
Exemplo n.º 3
0
void early_setup_secondary(void)
{
	struct paca_struct *lpaca = get_paca();

	/* Mark enabled in PACA */
	lpaca->proc_enabled = 0;

	/* Initialize hash table for that CPU */
	htab_initialize_secondary();

	/* Initialize STAB/SLB. We use a virtual address as it works
	 * in real mode on pSeries and we want a virutal address on
	 * iSeries anyway
	 */
	if (cpu_has_feature(CPU_FTR_SLB))
		slb_initialize();
	else
		stab_initialize(lpaca->stab_addr);
}