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Commit 6eb3c735 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: fixed virt/phys mapping helpers for PMB. 



This moves the pmb_remap_caller() mapping logic out in to
pmb_bolt_mapping(), which enables us to establish fixed mappings in
places such as the NUMA code.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 4cfa8e75

arch/sh/mm/pmb.c

+51 −46
Original line number Diff line number Diff line
@@ -270,60 +270,19 @@ static void set_pmb_entry(struct pmb_entry *pmbe) 


int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,

		     unsigned long size, pgprot_t prot)

{

	return 0;

}



void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,

			       pgprot_t prot, void *caller)

{

	struct pmb_entry *pmbp, *pmbe;

	unsigned long pmb_flags;

	int i, mapped;

	unsigned long orig_addr, vaddr;

	phys_addr_t offset, last_addr;

	phys_addr_t align_mask;

	unsigned long aligned;

	struct vm_struct *area;



	if (!pmb_iomapping_enabled)

		return NULL;

	if (!pmb_addr_valid(vaddr, size))

		return -EFAULT;



	/*

	 * Small mappings need to go through the TLB.

	 */

	if (size < SZ_16M)

		return ERR_PTR(-EINVAL);

	if (!pmb_prot_valid(prot))

		return ERR_PTR(-EINVAL);



	pmbp = NULL;

	pmb_flags = pgprot_to_pmb_flags(prot);

	mapped = 0;



	for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)

		if (size >= pmb_sizes[i].size)

			break;



	last_addr = phys + size;

	align_mask = ~(pmb_sizes[i].size - 1);

	offset = phys & ~align_mask;

	phys &= align_mask;

	aligned = ALIGN(last_addr, pmb_sizes[i].size) - phys;



	area = __get_vm_area_caller(aligned, VM_IOREMAP, uncached_end,

				    P3SEG, caller);

	if (!area)

		return NULL;



	area->phys_addr = phys;

	orig_addr = vaddr = (unsigned long)area->addr;



	if (!pmb_addr_valid(vaddr, aligned))

		return ERR_PTR(-EFAULT);

	pmbp = NULL;



again:

	for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++) {

	for (i = mapped = 0; i < ARRAY_SIZE(pmb_sizes); i++) {

		unsigned long flags;



		if (size < pmb_sizes[i].size)
@@ -333,7 +292,7 @@ again: 
				 PMB_NO_ENTRY);

		if (IS_ERR(pmbe)) {

			pmb_unmap_entry(pmbp, mapped);

			return pmbe;

			return PTR_ERR(pmbe);

		}



		spin_lock_irqsave(&pmbe->lock, flags);
@@ -372,6 +331,52 @@ again: 
	if (size >= SZ_16M)

		goto again;



	return 0;

}



void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,

			       pgprot_t prot, void *caller)

{

	unsigned long orig_addr, vaddr;

	phys_addr_t offset, last_addr;

	phys_addr_t align_mask;

	unsigned long aligned;

	struct vm_struct *area;

	int i, ret;



	if (!pmb_iomapping_enabled)

		return NULL;



	/*

	 * Small mappings need to go through the TLB.

	 */

	if (size < SZ_16M)

		return ERR_PTR(-EINVAL);

	if (!pmb_prot_valid(prot))

		return ERR_PTR(-EINVAL);



	for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)

		if (size >= pmb_sizes[i].size)

			break;



	last_addr = phys + size;

	align_mask = ~(pmb_sizes[i].size - 1);

	offset = phys & ~align_mask;

	phys &= align_mask;

	aligned = ALIGN(last_addr, pmb_sizes[i].size) - phys;



	area = __get_vm_area_caller(aligned, VM_IOREMAP, uncached_end,

				    P3SEG, caller);

	if (!area)

		return NULL;



	area->phys_addr = phys;

	orig_addr = vaddr = (unsigned long)area->addr;



	ret = pmb_bolt_mapping(vaddr, phys, size, prot);

	if (ret != 0)

		return ERR_PTR(ret);



	return (void __iomem *)(offset + (char *)orig_addr);

}