#include <asm/mach/map.h>
#include <plat/board.h>
-#include <plat/sram.h>
-
-#include "fb.h"
#if defined(CONFIG_FB_OMAP) || defined(CONFIG_FB_OMAP_MODULE)
return start1 >= start2 && start1 + size1 <= start2 + size2;
}
-
-/* Check if there is an overlapping region. */
-static int fbmem_region_reserved(unsigned long start, size_t size)
-{
- struct omapfb_mem_region *rg;
- int i;
-
- rg = &omapfb_config.mem_desc.region[0];
- for (i = 0; i < OMAPFB_PLANE_NUM; i++, rg++) {
- if (!rg->paddr)
- /* Empty slot. */
- continue;
- if (ranges_overlap(start, size, rg->paddr, rg->size))
- return 1;
- }
- return 0;
-}
-
/*
* Get the region_idx`th region from board config/ATAG and convert it to
* our internal format.
return 0;
}
-static int set_fbmem_region_type(struct omapfb_mem_region *rg, int mem_type,
- unsigned long mem_start,
- unsigned long mem_size)
-{
- /*
- * Check if the configuration specifies the type explicitly.
- * type = 0 && paddr = 0, a default don't care case maps to
- * the SDRAM type.
- */
- if (rg->type || !rg->paddr)
- return 0;
- if (ranges_overlap(rg->paddr, rg->size, mem_start, mem_size)) {
- rg->type = mem_type;
- return 0;
- }
- /* Can't determine it. */
- return -1;
-}
-
-static int check_fbmem_region(int region_idx, struct omapfb_mem_region *rg,
- unsigned long start_avail, unsigned size_avail)
-{
- unsigned long paddr = rg->paddr;
- size_t size = rg->size;
-
- if (rg->type > OMAPFB_MEMTYPE_MAX) {
- printk(KERN_ERR
- "Invalid start address for FB region %d\n", region_idx);
- return -EINVAL;
- }
-
- if (!rg->size) {
- printk(KERN_ERR "Zero size for FB region %d\n", region_idx);
- return -EINVAL;
- }
-
- if (!paddr)
- /* Allocate this dynamically, leave paddr 0 for now. */
- return 0;
-
- /*
- * Fixed region for the given RAM range. Check if it's already
- * reserved by the FB code or someone else.
- */
- if (fbmem_region_reserved(paddr, size) ||
- !range_included(paddr, size, start_avail, size_avail)) {
- printk(KERN_ERR "Trying to use reserved memory "
- "for FB region %d\n", region_idx);
- return -EINVAL;
- }
-
- return 0;
-}
-
static int valid_sdram(unsigned long addr, unsigned long size)
{
return memblock_is_region_memory(addr, size);
reserved);
}
-/*
- * Called at sram init time, before anything is pushed to the SRAM stack.
- * Because of the stack scheme, we will allocate everything from the
- * start of the lowest address region to the end of SRAM. This will also
- * include padding for page alignment and possible holes between regions.
- *
- * As opposed to the SDRAM case, we'll also do any dynamic allocations at
- * this point, since the driver built as a module would have problem with
- * freeing / reallocating the regions.
- */
-unsigned long __init omapfb_reserve_sram(unsigned long sram_pstart,
- unsigned long sram_vstart,
- unsigned long sram_size,
- unsigned long pstart_avail,
- unsigned long size_avail)
-{
- struct omapfb_mem_region rg;
- unsigned long pend_avail;
- unsigned long reserved;
- int i;
-
- if (config_invalid)
- return 0;
-
- reserved = 0;
- pend_avail = pstart_avail + size_avail;
- for (i = 0; ; i++) {
- if (get_fbmem_region(i, &rg) < 0)
- break;
- if (i == OMAPFB_PLANE_NUM) {
- printk(KERN_ERR
- "Extraneous FB mem configuration entries\n");
- config_invalid = 1;
- return 0;
- }
-
- /* Check if it's our memory type. */
- if (set_fbmem_region_type(&rg, OMAPFB_MEMTYPE_SRAM,
- sram_pstart, sram_size) < 0 ||
- (rg.type != OMAPFB_MEMTYPE_SRAM))
- continue;
- BUG_ON(omapfb_config.mem_desc.region[i].size);
-
- if (check_fbmem_region(i, &rg, pstart_avail, size_avail) < 0) {
- config_invalid = 1;
- return 0;
- }
-
- if (!rg.paddr) {
- /* Dynamic allocation */
- if ((size_avail & PAGE_MASK) < rg.size) {
- printk("Not enough SRAM for FB region %d\n",
- i);
- config_invalid = 1;
- return 0;
- }
- size_avail = (size_avail - rg.size) & PAGE_MASK;
- rg.paddr = pstart_avail + size_avail;
- }
- /* Reserve everything above the start of the region. */
- if (pend_avail - rg.paddr > reserved)
- reserved = pend_avail - rg.paddr;
- size_avail = pend_avail - reserved - pstart_avail;
-
- /*
- * We have a kernel mapping for this already, so the
- * driver won't have to make one.
- */
- rg.vaddr = (void *)(sram_vstart + rg.paddr - sram_pstart);
- omapfb_config.mem_desc.region[i] = rg;
- configured_regions++;
- }
- omapfb_config.mem_desc.region_cnt = i;
- if (reserved)
- pr_info("Reserving %lu bytes SRAM for frame buffer\n",
- reserved);
- return reserved;
-}
-
void omapfb_set_ctrl_platform_data(void *data)
{
omapfb_config.ctrl_platform_data = data;
{
}
-unsigned long __init omapfb_reserve_sram(unsigned long sram_pstart,
- unsigned long sram_vstart,
- unsigned long sram_size,
- unsigned long start_avail,
- unsigned long size_avail)
-{
- return 0;
-}
-
#else
void omapfb_set_platform_data(struct omapfb_platform_data *data)
{
}
-unsigned long __init omapfb_reserve_sram(unsigned long sram_pstart,
- unsigned long sram_vstart,
- unsigned long sram_size,
- unsigned long start_avail,
- unsigned long size_avail)
-{
- return 0;
-}
-
#endif
projects / ~andy / linux / commitdiff