[POWERPC] Abolish iopa(), mm_ptov(), io_block_mapping() from arch/powerpc
These old-fashioned IO mapping functions no longer have any callers in code which remains relevant on arch/powerpc. Therefore, this removes them from arch/powerpc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
David Gibson
Paul Mackerras
parent
4db68bfe71
commit
90ac19a8b2
|
|
@ -303,48 +303,6 @@ void __init mapin_ram(void)
|
|||
/* is x a power of 4? */
|
||||
#define is_power_of_4(x) is_power_of_2(x) && (ffs(x) & 1)
|
||||
|
||||
/*
|
||||
* Set up a mapping for a block of I/O.
|
||||
* virt, phys, size must all be page-aligned.
|
||||
* This should only be called before ioremap is called.
|
||||
*/
|
||||
void __init io_block_mapping(unsigned long virt, phys_addr_t phys,
|
||||
unsigned int size, int flags)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (virt > KERNELBASE && virt < ioremap_bot)
|
||||
ioremap_bot = ioremap_base = virt;
|
||||
|
||||
#ifdef HAVE_BATS
|
||||
/*
|
||||
* Use a BAT for this if possible...
|
||||
*/
|
||||
if (io_bat_index < 2 && is_power_of_2(size)
|
||||
&& (virt & (size - 1)) == 0 && (phys & (size - 1)) == 0) {
|
||||
setbat(io_bat_index, virt, phys, size, flags);
|
||||
++io_bat_index;
|
||||
return;
|
||||
}
|
||||
#endif /* HAVE_BATS */
|
||||
|
||||
#ifdef HAVE_TLBCAM
|
||||
/*
|
||||
* Use a CAM for this if possible...
|
||||
*/
|
||||
if (tlbcam_index < num_tlbcam_entries && is_power_of_4(size)
|
||||
&& (virt & (size - 1)) == 0 && (phys & (size - 1)) == 0) {
|
||||
settlbcam(tlbcam_index, virt, phys, size, flags, 0);
|
||||
++tlbcam_index;
|
||||
return;
|
||||
}
|
||||
#endif /* HAVE_TLBCAM */
|
||||
|
||||
/* No BATs available, put it in the page tables. */
|
||||
for (i = 0; i < size; i += PAGE_SIZE)
|
||||
map_page(virt + i, phys + i, flags);
|
||||
}
|
||||
|
||||
/* Scan the real Linux page tables and return a PTE pointer for
|
||||
* a virtual address in a context.
|
||||
* Returns true (1) if PTE was found, zero otherwise. The pointer to
|
||||
|
|
@ -379,82 +337,6 @@ get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep, pmd_t **pmdp)
|
|||
return(retval);
|
||||
}
|
||||
|
||||
/* Find physical address for this virtual address. Normally used by
|
||||
* I/O functions, but anyone can call it.
|
||||
*/
|
||||
unsigned long iopa(unsigned long addr)
|
||||
{
|
||||
unsigned long pa;
|
||||
|
||||
/* I don't know why this won't work on PMacs or CHRP. It
|
||||
* appears there is some bug, or there is some implicit
|
||||
* mapping done not properly represented by BATs or in page
|
||||
* tables.......I am actively working on resolving this, but
|
||||
* can't hold up other stuff. -- Dan
|
||||
*/
|
||||
pte_t *pte;
|
||||
struct mm_struct *mm;
|
||||
|
||||
/* Check the BATs */
|
||||
pa = v_mapped_by_bats(addr);
|
||||
if (pa)
|
||||
return pa;
|
||||
|
||||
/* Allow mapping of user addresses (within the thread)
|
||||
* for DMA if necessary.
|
||||
*/
|
||||
if (addr < TASK_SIZE)
|
||||
mm = current->mm;
|
||||
else
|
||||
mm = &init_mm;
|
||||
|
||||
pa = 0;
|
||||
if (get_pteptr(mm, addr, &pte, NULL)) {
|
||||
pa = (pte_val(*pte) & PAGE_MASK) | (addr & ~PAGE_MASK);
|
||||
pte_unmap(pte);
|
||||
}
|
||||
|
||||
return(pa);
|
||||
}
|
||||
|
||||
/* This is will find the virtual address for a physical one....
|
||||
* Swiped from APUS, could be dangerous :-).
|
||||
* This is only a placeholder until I really find a way to make this
|
||||
* work. -- Dan
|
||||
*/
|
||||
unsigned long
|
||||
mm_ptov (unsigned long paddr)
|
||||
{
|
||||
unsigned long ret;
|
||||
#if 0
|
||||
if (paddr < 16*1024*1024)
|
||||
ret = ZTWO_VADDR(paddr);
|
||||
else {
|
||||
int i;
|
||||
|
||||
for (i = 0; i < kmap_chunk_count;){
|
||||
unsigned long phys = kmap_chunks[i++];
|
||||
unsigned long size = kmap_chunks[i++];
|
||||
unsigned long virt = kmap_chunks[i++];
|
||||
if (paddr >= phys
|
||||
&& paddr < (phys + size)){
|
||||
ret = virt + paddr - phys;
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
|
||||
ret = (unsigned long) __va(paddr);
|
||||
}
|
||||
exit:
|
||||
#ifdef DEBUGPV
|
||||
printk ("PTOV(%lx)=%lx\n", paddr, ret);
|
||||
#endif
|
||||
#else
|
||||
ret = (unsigned long)paddr + KERNELBASE;
|
||||
#endif
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_DEBUG_PAGEALLOC
|
||||
|
||||
static int __change_page_attr(struct page *page, pgprot_t prot)
|
||||
|
|
|
|||
|
|
@ -633,13 +633,6 @@ extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea,
|
|||
unsigned long size, unsigned long flags);
|
||||
extern void __iounmap_at(void *ea, unsigned long size);
|
||||
|
||||
/* Those are more 32 bits only functions */
|
||||
extern unsigned long iopa(unsigned long addr);
|
||||
extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
|
||||
extern void io_block_mapping(unsigned long virt, phys_addr_t phys,
|
||||
unsigned int size, int flags);
|
||||
|
||||
|
||||
/*
|
||||
* When CONFIG_PPC_INDIRECT_IO is set, we use the generic iomap implementation
|
||||
* which needs some additional definitions here. They basically allow PIO
|
||||
|
|
|
|||
|
|
@ -756,8 +756,6 @@ extern void paging_init(void);
|
|||
extern void cache_clear(__u32 addr, int length);
|
||||
extern void cache_push(__u32 addr, int length);
|
||||
extern int mm_end_of_chunk (unsigned long addr, int len);
|
||||
extern unsigned long iopa(unsigned long addr);
|
||||
extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
|
||||
|
||||
/* Values for nocacheflag and cmode */
|
||||
/* These are not used by the APUS kernel_map, but prevents
|
||||
|
|
|
|||
Loading…
Reference in New Issue