forked from KolibriOS/kolibrios
628 lines
15 KiB
C
628 lines
15 KiB
C
#include <ddk.h>
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/dma-mapping.h>
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#include <drm/drmP.h>
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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#include "intel_drv.h"
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#include <linux/hdmi.h>
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#include <linux/seq_file.h>
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#include <linux/fence.h>
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#include "i915_kos32.h"
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struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags)
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{
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struct file *filep;
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int count;
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filep = __builtin_malloc(sizeof(*filep));
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if(unlikely(filep == NULL))
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return ERR_PTR(-ENOMEM);
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count = size / PAGE_SIZE;
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filep->pages = kzalloc(sizeof(struct page *) * count, 0);
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if(unlikely(filep->pages == NULL))
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{
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kfree(filep);
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return ERR_PTR(-ENOMEM);
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};
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filep->count = count;
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filep->allocated = 0;
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filep->vma = NULL;
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// printf("%s file %p pages %p count %d\n",
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// __FUNCTION__,filep, filep->pages, count);
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return filep;
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}
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struct page *shmem_read_mapping_page_gfp(struct file *filep,
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pgoff_t index, gfp_t gfp)
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{
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struct page *page;
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if(unlikely(index >= filep->count))
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return ERR_PTR(-EINVAL);
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page = filep->pages[index];
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if(unlikely(page == NULL))
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{
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page = (struct page *)AllocPage();
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if(unlikely(page == NULL))
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return ERR_PTR(-ENOMEM);
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filep->pages[index] = page;
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// printf("file %p index %d page %x\n", filep, index, page);
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// delay(1);
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};
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return page;
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};
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unsigned long vm_mmap(struct file *file, unsigned long addr,
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unsigned long len, unsigned long prot,
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unsigned long flag, unsigned long offset)
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{
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char *mem, *ptr;
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int i;
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if (unlikely(offset + PAGE_ALIGN(len) < offset))
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return -EINVAL;
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if (unlikely(offset & ~PAGE_MASK))
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return -EINVAL;
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mem = UserAlloc(len);
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if(unlikely(mem == NULL))
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return -ENOMEM;
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for(i = offset, ptr = mem; i < offset+len; i+= 4096, ptr+= 4096)
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{
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struct page *page;
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page = shmem_read_mapping_page_gfp(file, i/PAGE_SIZE,0);
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if (unlikely(IS_ERR(page)))
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goto err;
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MapPage(ptr, (addr_t)page, PG_SHARED|PG_UW);
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}
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return (unsigned long)mem;
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err:
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UserFree(mem);
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return -ENOMEM;
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};
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void shmem_file_delete(struct file *filep)
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{
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// printf("%s file %p pages %p count %d\n",
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// __FUNCTION__, filep, filep->pages, filep->count);
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if(filep->pages)
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kfree(filep->pages);
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}
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static void *check_bytes8(const u8 *start, u8 value, unsigned int bytes)
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{
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while (bytes) {
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if (*start != value)
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return (void *)start;
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start++;
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bytes--;
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}
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return NULL;
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}
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/**
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* memchr_inv - Find an unmatching character in an area of memory.
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* @start: The memory area
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* @c: Find a character other than c
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* @bytes: The size of the area.
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*
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* returns the address of the first character other than @c, or %NULL
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* if the whole buffer contains just @c.
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*/
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void *memchr_inv(const void *start, int c, size_t bytes)
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{
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u8 value = c;
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u64 value64;
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unsigned int words, prefix;
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if (bytes <= 16)
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return check_bytes8(start, value, bytes);
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value64 = value;
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#if defined(ARCH_HAS_FAST_MULTIPLIER) && BITS_PER_LONG == 64
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value64 *= 0x0101010101010101;
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#elif defined(ARCH_HAS_FAST_MULTIPLIER)
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value64 *= 0x01010101;
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value64 |= value64 << 32;
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#else
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value64 |= value64 << 8;
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value64 |= value64 << 16;
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value64 |= value64 << 32;
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#endif
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prefix = (unsigned long)start % 8;
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if (prefix) {
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u8 *r;
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prefix = 8 - prefix;
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r = check_bytes8(start, value, prefix);
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if (r)
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return r;
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start += prefix;
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bytes -= prefix;
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}
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words = bytes / 8;
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while (words) {
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if (*(u64 *)start != value64)
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return check_bytes8(start, value, 8);
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start += 8;
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words--;
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}
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return check_bytes8(start, value, bytes % 8);
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}
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int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction)
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{
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struct scatterlist *s;
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int i;
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for_each_sg(sg, s, nents, i) {
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s->dma_address = (dma_addr_t)sg_phys(s);
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#ifdef CONFIG_NEED_SG_DMA_LENGTH
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s->dma_length = s->length;
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#endif
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}
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return nents;
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}
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void
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dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
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enum dma_data_direction direction)
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{
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};
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#define _U 0x01 /* upper */
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#define _L 0x02 /* lower */
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#define _D 0x04 /* digit */
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#define _C 0x08 /* cntrl */
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#define _P 0x10 /* punct */
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#define _S 0x20 /* white space (space/lf/tab) */
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#define _X 0x40 /* hex digit */
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#define _SP 0x80 /* hard space (0x20) */
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extern const unsigned char _ctype[];
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#define __ismask(x) (_ctype[(int)(unsigned char)(x)])
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#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
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#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
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#define iscntrl(c) ((__ismask(c)&(_C)) != 0)
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#define isdigit(c) ((__ismask(c)&(_D)) != 0)
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#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
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#define islower(c) ((__ismask(c)&(_L)) != 0)
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#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
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#define ispunct(c) ((__ismask(c)&(_P)) != 0)
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/* Note: isspace() must return false for %NUL-terminator */
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#define isspace(c) ((__ismask(c)&(_S)) != 0)
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#define isupper(c) ((__ismask(c)&(_U)) != 0)
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#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)
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#define isascii(c) (((unsigned char)(c))<=0x7f)
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#define toascii(c) (((unsigned char)(c))&0x7f)
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static inline unsigned char __tolower(unsigned char c)
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{
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if (isupper(c))
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c -= 'A'-'a';
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return c;
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}
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static inline unsigned char __toupper(unsigned char c)
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{
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if (islower(c))
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c -= 'a'-'A';
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return c;
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}
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#define tolower(c) __tolower(c)
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#define toupper(c) __toupper(c)
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/*
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* Fast implementation of tolower() for internal usage. Do not use in your
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* code.
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*/
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static inline char _tolower(const char c)
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{
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return c | 0x20;
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}
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void *kmemdup(const void *src, size_t len, gfp_t gfp)
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{
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void *p;
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p = kmalloc(len, gfp);
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if (p)
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memcpy(p, src, len);
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return p;
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}
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void msleep(unsigned int msecs)
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{
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msecs /= 10;
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if(!msecs) msecs = 1;
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__asm__ __volatile__ (
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"call *__imp__Delay"
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::"b" (msecs));
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__asm__ __volatile__ (
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"":::"ebx");
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};
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/* simple loop based delay: */
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static void delay_loop(unsigned long loops)
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{
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asm volatile(
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" test %0,%0 \n"
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" jz 3f \n"
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" jmp 1f \n"
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".align 16 \n"
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"1: jmp 2f \n"
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".align 16 \n"
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"2: dec %0 \n"
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" jnz 2b \n"
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"3: dec %0 \n"
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: /* we don't need output */
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:"a" (loops)
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);
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}
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static void (*delay_fn)(unsigned long) = delay_loop;
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void __delay(unsigned long loops)
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{
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delay_fn(loops);
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}
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inline void __const_udelay(unsigned long xloops)
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{
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int d0;
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xloops *= 4;
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asm("mull %%edx"
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: "=d" (xloops), "=&a" (d0)
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: "1" (xloops), ""
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(loops_per_jiffy * (HZ/4)));
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__delay(++xloops);
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}
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void __udelay(unsigned long usecs)
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{
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__const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */
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}
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unsigned int _sw_hweight32(unsigned int w)
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{
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#ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER
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w -= (w >> 1) & 0x55555555;
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w = (w & 0x33333333) + ((w >> 2) & 0x33333333);
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w = (w + (w >> 4)) & 0x0f0f0f0f;
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return (w * 0x01010101) >> 24;
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#else
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unsigned int res = w - ((w >> 1) & 0x55555555);
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res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
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res = (res + (res >> 4)) & 0x0F0F0F0F;
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res = res + (res >> 8);
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return (res + (res >> 16)) & 0x000000FF;
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#endif
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}
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EXPORT_SYMBOL(_sw_hweight32);
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void usleep_range(unsigned long min, unsigned long max)
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{
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udelay(max);
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}
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EXPORT_SYMBOL(usleep_range);
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static unsigned long round_jiffies_common(unsigned long j, int cpu,
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bool force_up)
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{
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int rem;
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unsigned long original = j;
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/*
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* We don't want all cpus firing their timers at once hitting the
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* same lock or cachelines, so we skew each extra cpu with an extra
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* 3 jiffies. This 3 jiffies came originally from the mm/ code which
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* already did this.
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* The skew is done by adding 3*cpunr, then round, then subtract this
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* extra offset again.
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*/
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j += cpu * 3;
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rem = j % HZ;
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/*
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* If the target jiffie is just after a whole second (which can happen
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* due to delays of the timer irq, long irq off times etc etc) then
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* we should round down to the whole second, not up. Use 1/4th second
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* as cutoff for this rounding as an extreme upper bound for this.
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* But never round down if @force_up is set.
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*/
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if (rem < HZ/4 && !force_up) /* round down */
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j = j - rem;
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else /* round up */
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j = j - rem + HZ;
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/* now that we have rounded, subtract the extra skew again */
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j -= cpu * 3;
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/*
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* Make sure j is still in the future. Otherwise return the
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* unmodified value.
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*/
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return time_is_after_jiffies(j) ? j : original;
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}
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unsigned long round_jiffies_up_relative(unsigned long j, int cpu)
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{
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unsigned long j0 = jiffies;
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/* Use j0 because jiffies might change while we run */
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return round_jiffies_common(j + j0, 0, true) - j0;
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}
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EXPORT_SYMBOL_GPL(__round_jiffies_up_relative);
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#include <linux/rcupdate.h>
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struct rcu_ctrlblk {
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struct rcu_head *rcucblist; /* List of pending callbacks (CBs). */
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struct rcu_head **donetail; /* ->next pointer of last "done" CB. */
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struct rcu_head **curtail; /* ->next pointer of last CB. */
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// RCU_TRACE(long qlen); /* Number of pending CBs. */
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// RCU_TRACE(unsigned long gp_start); /* Start time for stalls. */
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// RCU_TRACE(unsigned long ticks_this_gp); /* Statistic for stalls. */
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// RCU_TRACE(unsigned long jiffies_stall); /* Jiffies at next stall. */
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// RCU_TRACE(const char *name); /* Name of RCU type. */
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};
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/* Definition for rcupdate control block. */
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static struct rcu_ctrlblk rcu_sched_ctrlblk = {
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.donetail = &rcu_sched_ctrlblk.rcucblist,
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.curtail = &rcu_sched_ctrlblk.rcucblist,
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// RCU_TRACE(.name = "rcu_sched")
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};
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static void __call_rcu(struct rcu_head *head,
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void (*func)(struct rcu_head *rcu),
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struct rcu_ctrlblk *rcp)
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{
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unsigned long flags;
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// debug_rcu_head_queue(head);
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head->func = func;
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head->next = NULL;
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local_irq_save(flags);
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*rcp->curtail = head;
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rcp->curtail = &head->next;
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// RCU_TRACE(rcp->qlen++);
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local_irq_restore(flags);
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}
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/*
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* Post an RCU callback to be invoked after the end of an RCU-sched grace
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* period. But since we have but one CPU, that would be after any
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* quiescent state.
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*/
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void call_rcu_sched(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
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{
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__call_rcu(head, func, &rcu_sched_ctrlblk);
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}
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int seq_puts(struct seq_file *m, const char *s)
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{
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return 0;
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};
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__printf(2, 3) int seq_printf(struct seq_file *m, const char *f, ...)
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{
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return 0;
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}
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ktime_t ktime_get(void)
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{
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ktime_t t;
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t.tv64 = GetClockNs();
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return t;
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}
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char *strdup(const char *str)
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{
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size_t len = strlen(str) + 1;
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char *copy = __builtin_malloc(len);
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if (copy)
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{
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memcpy (copy, str, len);
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}
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return copy;
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}
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int split_cmdline(char *cmdline, char **argv)
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{
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enum quote_state
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{
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QUOTE_NONE, /* no " active in current parm */
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QUOTE_DELIMITER, /* " was first char and must be last */
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QUOTE_STARTED /* " was seen, look for a match */
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};
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enum quote_state state;
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unsigned int argc;
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char *p = cmdline;
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char *new_arg, *start;
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argc = 0;
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for(;;)
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{
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/* skip over spaces and tabs */
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if ( *p )
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{
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while (*p == ' ' || *p == '\t')
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++p;
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}
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if (*p == '\0')
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break;
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state = QUOTE_NONE;
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if( *p == '\"' )
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{
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p++;
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state = QUOTE_DELIMITER;
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}
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new_arg = start = p;
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for (;;)
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{
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if( *p == '\"' )
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{
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p++;
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if( state == QUOTE_NONE )
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{
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state = QUOTE_STARTED;
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}
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else
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{
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state = QUOTE_NONE;
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}
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continue;
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}
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if( *p == ' ' || *p == '\t' )
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{
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if( state == QUOTE_NONE )
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{
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break;
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}
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}
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if( *p == '\0' )
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break;
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if( *p == '\\' )
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{
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if( p[1] == '\"' )
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{
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++p;
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if( p[-2] == '\\' )
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{
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continue;
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}
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}
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}
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if( argv )
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{
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*(new_arg++) = *p;
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}
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++p;
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};
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if( argv )
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{
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argv[ argc ] = start;
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++argc;
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/*
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|
The *new = '\0' is req'd in case there was a \" to "
|
|
translation. It must be after the *p check against
|
|
'\0' because new and p could point to the same char
|
|
in which case the scan would be terminated too soon.
|
|
*/
|
|
|
|
if( *p == '\0' )
|
|
{
|
|
*new_arg = '\0';
|
|
break;
|
|
}
|
|
*new_arg = '\0';
|
|
++p;
|
|
}
|
|
else
|
|
{
|
|
++argc;
|
|
if( *p == '\0' )
|
|
{
|
|
break;
|
|
}
|
|
++p;
|
|
}
|
|
}
|
|
|
|
return argc;
|
|
};
|
|
|
|
|
|
int fb_get_options(const char *name, char **option)
|
|
{
|
|
char *opt, *options = NULL;
|
|
int retval = 1;
|
|
int name_len;
|
|
|
|
if(i915.cmdline_mode == NULL)
|
|
return 1;
|
|
|
|
name_len = __builtin_strlen(name);
|
|
|
|
if (name_len )
|
|
{
|
|
opt = i915.cmdline_mode;
|
|
if (!__builtin_strncmp(name, opt, name_len) &&
|
|
opt[name_len] == ':')
|
|
{
|
|
options = opt + name_len + 1;
|
|
retval = 0;
|
|
}
|
|
}
|
|
|
|
if (option)
|
|
*option = options;
|
|
|
|
return retval;
|
|
}
|