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Implement fast VFL read API (as a dummy) for Nano2G

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25147 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sparmann 2010-03-13 20:27:21 +00:00
parent 4a6d160f75
commit 16587900da
1 changed files with 29 additions and 0 deletions
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29
firmware/target/arm/s5l8700/ipodnano2g/ftl-nano2g.c
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@ -850,6 +850,35 @@ uint32_t ftl_vfl_read(uint32_t vpage, void* buffer, void* sparebuffer,
}
/* Multi-bank version of ftl_vfl_read, will read ftl_banks pages in parallel */
uint32_t ftl_vfl_read_fast(uint32_t vpage, void* buffer, void* sparebuffer,
uint32_t checkempty, uint32_t remaponfail)
{
uint32_t i, rc = 0;
uint32_t ppb = (*ftl_nand_type).pagesperblock * ftl_banks;
uint32_t syshyperblocks = (*ftl_nand_type).blocks
- (*ftl_nand_type).userblocks - 0x17;
uint32_t abspage = vpage + ppb * syshyperblocks;
if (abspage + ftl_banks - 1 >= (*ftl_nand_type).blocks * ppb || abspage < ppb)
panicf("FTL: Trying to read out-of-bounds vPage %u", (unsigned)vpage);
//return 4;
for (i = 0; i < ftl_banks; i++)
{
void* databuf = (void*)0;
void* sparebuf = (void*)0;
if (buffer) databuf = (void*)((uint32_t)buffer + 0x800 * i);
if (sparebuffer) sparebuf = (void*)((uint32_t)sparebuffer + 0x40 * i);
uint32_t ret = ftl_vfl_read(vpage + i, databuf, sparebuf, checkempty, remaponfail);
if (ret & 1) rc |= 1 << (i << 2);
if (ret & 2) rc |= 2 << (i << 2);
if (ret & 0x10) rc |= 4 << (i << 2);
if (ret & 0x100) rc |= 8 << (i << 2);
}
return rc;
}
#ifndef FTL_READONLY
/* Writes the specified vPage, dealing with all kinds of trouble */
uint32_t ftl_vfl_write_single(uint32_t vpage, void* buffer, void* sparebuffer)