mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 01:44:39 +02:00
jz4740: Remove imem and ipu support from proc
It's not used and wastes 4MB of mem.
This commit is contained in:
Lars-Peter Clausen
parent
928b8ba548
commit
bc0684a065
@ -166,26 +166,6 @@ static int cgm_write_proc(struct file *file, const char *buffer, unsigned long c
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}
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/* USAGE:
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* echo n > /proc/jz/ipu // n = [1,...,9], alloc mem, 2^n pages.
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* echo FF > /proc/jz/ipu // 255, free all buffer
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* echo xxxx > /proc/jz/ipu // free buffer which addr is xxxx
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* echo llll > /proc/jz/ipu // add_wired_entry(l,l,l,l)
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* echo 0 > /proc/jz/ipu // debug, print ipu_buf
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* od -X /proc/jz/ipu // read mem addr
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*/
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typedef struct _ipu_buf {
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unsigned int addr; /* phys addr */
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unsigned int page_shift;
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} ipu_buf_t;
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#define IPU_BUF_MAX 4 /* 4 buffers */
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static struct _ipu_buf ipu_buf[IPU_BUF_MAX];
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static int ipu_buf_cnt = 0;
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static unsigned char g_asid=0;
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extern void local_flush_tlb_all(void);
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/* CP0 hazard avoidance. */
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@ -235,244 +215,6 @@ void show_tlb(void)
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local_irq_restore(flags);
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}
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static void ipu_add_wired_entry(unsigned long pid,
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unsigned long entrylo0, unsigned long entrylo1,
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unsigned long entryhi, unsigned long pagemask)
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{
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unsigned long flags;
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unsigned long wired;
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unsigned long old_pagemask;
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unsigned long old_ctx;
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struct task_struct *g, *p;
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/* We will lock an 4MB page size entry to map the 4MB reserved IPU memory */
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wired = read_c0_wired();
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if (wired) return;
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do_each_thread(g, p) {
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if (p->pid == pid )
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g_asid = p->mm->context[0];
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} while_each_thread(g, p);
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local_irq_save(flags);
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entrylo0 = entrylo0 >> 6; /* PFN */
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entrylo0 |= 0x6 | (0 << 3); /* Write-through cacheable, dirty, valid */
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/* Save old context and create impossible VPN2 value */
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old_ctx = read_c0_entryhi() & 0xff;
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old_pagemask = read_c0_pagemask();
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write_c0_wired(wired + 1);
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write_c0_index(wired);
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BARRIER;
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entryhi &= ~0xff; /* new add, 20070906 */
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entryhi |= g_asid; /* new add, 20070906 */
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// entryhi |= old_ctx; /* new add, 20070906 */
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write_c0_pagemask(pagemask);
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write_c0_entryhi(entryhi);
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write_c0_entrylo0(entrylo0);
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write_c0_entrylo1(entrylo1);
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BARRIER;
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tlb_write_indexed();
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BARRIER;
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write_c0_entryhi(old_ctx);
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BARRIER;
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write_c0_pagemask(old_pagemask);
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local_flush_tlb_all();
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local_irq_restore(flags);
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#if defined(DEBUG)
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printk("\nold_ctx=%03d\n", old_ctx);
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show_tlb();
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#endif
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}
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static void ipu_del_wired_entry( void )
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{
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unsigned long flags;
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unsigned long wired;
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/* Free all lock entry */
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local_irq_save(flags);
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wired = read_c0_wired();
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if (wired)
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write_c0_wired(0);
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local_irq_restore(flags);
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}
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static inline void ipu_buf_get( unsigned int page_shift )
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{
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unsigned char * virt_addr;
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int i;
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for ( i=0; i< IPU_BUF_MAX; ++i ) {
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if ( ipu_buf[i].addr == 0 ) {
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break;
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}
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}
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if ( (ipu_buf_cnt = i) == IPU_BUF_MAX ) {
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printk("Error, no free ipu buffer.\n");
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return ;
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}
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virt_addr = (unsigned char *)__get_free_pages(GFP_KERNEL, page_shift);
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if ( virt_addr ) {
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ipu_buf[ipu_buf_cnt].addr = (unsigned int)virt_to_phys((void *)virt_addr);
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ipu_buf[ipu_buf_cnt].page_shift = page_shift;
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for (i = 0; i < (1<<page_shift); i++) {
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SetPageReserved(virt_to_page(virt_addr));
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virt_addr += PAGE_SIZE;
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}
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}
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else {
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printk("get memory Failed.\n");
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}
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}
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static inline void ipu_buf_free( unsigned int phys_addr )
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{
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unsigned char * virt_addr, *addr;
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int cnt, i;
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if ( phys_addr == 0 )
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return ;
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for ( cnt=0; cnt<IPU_BUF_MAX; ++cnt )
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if ( phys_addr == ipu_buf[cnt].addr )
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break;
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if ( cnt == IPU_BUF_MAX ) { /* addr not in the ipu buffers */
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printk("Invalid addr:0x%08x\n", (unsigned int)phys_addr);
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}
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virt_addr = (unsigned char *)phys_to_virt(ipu_buf[cnt].addr);
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addr = virt_addr;
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for (i = 0; i < (1<<ipu_buf[cnt].page_shift); i++) {
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ClearPageReserved(virt_to_page(addr));
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addr += PAGE_SIZE;
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}
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if ( cnt == 0 )
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ipu_del_wired_entry();
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free_pages((unsigned long )virt_addr, ipu_buf[cnt].page_shift);
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ipu_buf[cnt].addr = 0;
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ipu_buf[cnt].page_shift = 0;
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}
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static int ipu_read_proc (char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len = 0;
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/* read as binary */
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unsigned int * pint;
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pint = (unsigned int *) (page+len);
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if ( ipu_buf_cnt >= IPU_BUF_MAX ) { /* failed alloc mem, rturn 0 */
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printk("no free buffer.\n");
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*pint = 0;
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}
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else
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*pint = (unsigned int )ipu_buf[ipu_buf_cnt].addr; /* phys addr */
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len += sizeof(unsigned int);
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#if defined(DEBUG)
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show_tlb();
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#endif
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return len;
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}
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static int ipu_write_proc(struct file *file, const char *buffer, unsigned long count, void *data)
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{
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unsigned int val ;
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int cnt,i;
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char buf[12];
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unsigned long pid, entrylo0, entrylo1, entryhi, pagemask;
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#if defined(DEBUG)
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printk("ipu write count=%u\n", count);
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#endif
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if (count == (8*5+1)) {
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for (i=0;i<12;i++) buf[i]=0;
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strncpy(buf, buffer+8*0, 8);
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pid = simple_strtoul(buf, 0, 16);
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for (i=0;i<12;i++) buf[i]=0;
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strncpy(buf, buffer+8*1, 8);
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entrylo0 = simple_strtoul(buf, 0, 16);
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for (i=0;i<12;i++) buf[i]=0;
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strncpy(buf, buffer+8*2, 8);
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entrylo1 = simple_strtoul(buf, 0, 16);
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for (i=0;i<12;i++) buf[i]=0;
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strncpy(buf, buffer+8*3, 8);
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entryhi = simple_strtoul(buf, 0, 16);
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for (i=0;i<12;i++) buf[i]=0;
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strncpy(buf, buffer+8*4, 8);
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pagemask = simple_strtoul(buf, 0, 16);
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#if defined(DEBUG)
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printk("pid=0x%08x, entrylo0=0x%08x, entrylo1=0x%08x, entryhi=0x%08x, pagemask=0x%08x\n",
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pid, entrylo0, entrylo1, entryhi, pagemask);
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#endif
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ipu_add_wired_entry( pid, entrylo0, entrylo1, entryhi, pagemask);
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return 41;
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} else if ( count <= 8+1 ) {
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for (i=0;i<12;i++) buf[i]=0;
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strncpy(buf, buffer, 8);
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val = simple_strtoul(buf, 0, 16);
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} else if (count == 44) {
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for (i = 0; i < 12; i++)
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buf[i] = 0;
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strncpy(buf, buffer, 10);
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pid = simple_strtoul(buf, 0, 16);
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for (i = 0; i < 12; i++)
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buf[i] = 0;
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strncpy(buf, buffer + 11, 10);
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entryhi = simple_strtoul(buf, 0, 16);//vaddr
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for (i = 0; i < 12; i++)
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buf[i] = 0;
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strncpy(buf, buffer + 22, 10);
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entrylo0 = simple_strtoul(buf, 0, 16);//paddr
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for (i = 0; i < 12; i++)
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buf[i] = 0;
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strncpy(buf, buffer + 33, 10);
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pagemask = simple_strtoul(buf, 0, 16);
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pagemask = 0x3ff << 13; /* Fixed to 4MB page size */
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ipu_add_wired_entry(pid, entrylo0, 0, entryhi, pagemask);
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return 44;
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} else {
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printk("ipu write count error, count=%d\n.", (unsigned int)count);
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return -1;
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}
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/* val: 1-9, page_shift, val>= 10: ipu_buf.addr */
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if ( val == 0 ) { /* debug, print ipu_buf info */
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for ( cnt=0; cnt<IPU_BUF_MAX; ++cnt)
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printk("ipu_buf[%d]: addr=0x%08x, page_shift=%d\n",
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cnt, ipu_buf[cnt].addr, ipu_buf[cnt].page_shift );
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#if defined(DEBUG)
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show_tlb();
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#endif
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}
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else if ( 0< val && val < 10 ) {
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ipu_buf_get(val);
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}
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else if ( val == 0xff ) { /* 255: free all ipu_buf */
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for ( cnt=0; cnt<IPU_BUF_MAX; ++cnt ) {
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ipu_buf_free(ipu_buf[cnt].addr);
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}
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}
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else {
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ipu_buf_free(val);
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}
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return count;
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}
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/*
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* UDC hotplug
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*/
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@ -517,245 +259,6 @@ static int udc_read_proc(char *page, char **start, off_t off,
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return len;
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}
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/***********************************************************************
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* IPU memory management (used by mplayer and other apps)
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*
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* We reserved 4MB memory for IPU
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* The memory base address is jz_ipu_framebuf
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*/
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/* Usage:
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*
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* echo n > /proc/jz/imem // n = [0,...,10], allocate memory, 2^n pages
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* echo xxxxxxxx > /proc/jz/imem // free buffer which addr is xxxxxxxx
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* echo FF > /proc/jz/ipu // FF, free all buffers
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* od -X /proc/jz/imem // return the allocated buffer address and the max order of free buffer
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*/
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//#define DEBUG_IMEM 1
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#define IMEM_MAX_ORDER 10 /* max 2^10 * 4096 = 4MB */
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static unsigned int jz_imem_base; /* physical base address of ipu memory */
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static unsigned int allocated_phys_addr = 0;
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/*
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* Allocated buffer list
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*/
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typedef struct imem_list {
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unsigned int phys_start; /* physical start addr */
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unsigned int phys_end; /* physical end addr */
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struct imem_list *next;
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} imem_list_t;
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static struct imem_list *imem_list_head = NULL; /* up sorted by phys_start */
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#ifdef DEBUG_IMEM
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static void dump_imem_list(void)
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{
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struct imem_list *imem;
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printk("*** dump_imem_list 0x%x ***\n", (u32)imem_list_head);
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imem = imem_list_head;
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while (imem) {
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printk("imem=0x%x phys_start=0x%x phys_end=0x%x next=0x%x\n", (u32)imem, imem->phys_start, imem->phys_end, (u32)imem->next);
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imem = imem->next;
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}
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}
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#endif
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/* allocate 2^order pages inside the 4MB memory */
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static int imem_alloc(unsigned int order)
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{
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int alloc_ok = 0;
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unsigned int start, end;
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unsigned int size = (1 << order) * PAGE_SIZE;
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struct imem_list *imem, *imemn, *imemp;
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allocated_phys_addr = 0;
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start = jz_imem_base;
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end = start + (1 << IMEM_MAX_ORDER) * PAGE_SIZE;
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imem = imem_list_head;
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while (imem) {
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if ((imem->phys_start - start) >= size) {
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/* we got a valid address range */
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alloc_ok = 1;
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break;
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}
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start = imem->phys_end + 1;
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imem = imem->next;
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}
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if (!alloc_ok) {
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if ((end - start) >= size)
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alloc_ok = 1;
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}
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if (alloc_ok) {
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end = start + size - 1;
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allocated_phys_addr = start;
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/* add to imem_list, up sorted by phys_start */
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imemn = kmalloc(sizeof(struct imem_list), GFP_KERNEL);
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if (!imemn) {
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return -ENOMEM;
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}
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imemn->phys_start = start;
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imemn->phys_end = end;
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imemn->next = NULL;
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if (!imem_list_head)
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imem_list_head = imemn;
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else {
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imem = imemp = imem_list_head;
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while (imem) {
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if (start < imem->phys_start) {
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break;
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}
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imemp = imem;
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imem = imem->next;
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}
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if (imem == imem_list_head) {
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imem_list_head = imemn;
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imemn->next = imem;
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}
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else {
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imemn->next = imemp->next;
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imemp->next = imemn;
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}
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}
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}
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#ifdef DEBUG_IMEM
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dump_imem_list();
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#endif
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return 0;
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}
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static void imem_free(unsigned int phys_addr)
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{
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struct imem_list *imem, *imemp;
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imem = imemp = imem_list_head;
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while (imem) {
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if (phys_addr == imem->phys_start) {
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if (imem == imem_list_head) {
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imem_list_head = imem->next;
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}
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else {
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imemp->next = imem->next;
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}
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kfree(imem);
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break;
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}
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imemp = imem;
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imem = imem->next;
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}
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#ifdef DEBUG_IMEM
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dump_imem_list();
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#endif
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}
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static void imem_free_all(void)
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{
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struct imem_list *imem;
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imem = imem_list_head;
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while (imem) {
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kfree(imem);
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imem = imem->next;
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}
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imem_list_head = NULL;
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allocated_phys_addr = 0;
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#ifdef DEBUG_IMEM
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dump_imem_list();
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#endif
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}
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/*
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* Return the allocated buffer address and the max order of free buffer
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*/
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static int imem_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len = 0;
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unsigned int start_addr, end_addr, max_order, max_size;
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struct imem_list *imem;
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unsigned int *tmp = (unsigned int *)(page + len);
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start_addr = jz_imem_base;
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end_addr = start_addr + (1 << IMEM_MAX_ORDER) * PAGE_SIZE;
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if (!imem_list_head)
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max_size = end_addr - start_addr;
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else {
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max_size = 0;
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imem = imem_list_head;
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while (imem) {
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if (max_size < (imem->phys_start - start_addr))
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max_size = imem->phys_start - start_addr;
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start_addr = imem->phys_end + 1;
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imem = imem->next;
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}
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if (max_size < (end_addr - start_addr))
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max_size = end_addr - start_addr;
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}
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if (max_size > 0) {
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max_order = get_order(max_size);
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if (((1 << max_order) * PAGE_SIZE) > max_size)
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max_order--;
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}
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else {
|
||||
max_order = 0xffffffff; /* No any free buffer */
|
||||
}
|
||||
|
||||
*tmp++ = allocated_phys_addr; /* address allocated by 'echo n > /proc/jz/imem' */
|
||||
*tmp = max_order; /* max order of current free buffers */
|
||||
|
||||
len += 2 * sizeof(unsigned int);
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
static int imem_write_proc(struct file *file, const char *buffer, unsigned long count, void *data)
|
||||
{
|
||||
unsigned int val;
|
||||
|
||||
val = simple_strtoul(buffer, 0, 16);
|
||||
|
||||
if (val == 0xff) {
|
||||
/* free all memory */
|
||||
imem_free_all();
|
||||
ipu_del_wired_entry();
|
||||
}
|
||||
else if ((val >= 0) && (val <= IMEM_MAX_ORDER)) {
|
||||
/* allocate 2^val pages */
|
||||
imem_alloc(val);
|
||||
}
|
||||
else {
|
||||
/* free buffer which phys_addr is val */
|
||||
imem_free(val);
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
/*
|
||||
* /proc/jz/xxx entry
|
||||
*
|
||||
@ -791,14 +294,6 @@ static int __init jz_proc_init(void)
|
||||
res->data = NULL;
|
||||
}
|
||||
|
||||
/* Image process unit */
|
||||
res = create_proc_entry("ipu", 0644, proc_jz_root);
|
||||
if (res) {
|
||||
res->read_proc = ipu_read_proc;
|
||||
res->write_proc = ipu_write_proc;
|
||||
res->data = NULL;
|
||||
}
|
||||
|
||||
/* udc hotplug */
|
||||
res = create_proc_entry("udc", 0644, proc_jz_root);
|
||||
if (res) {
|
||||
@ -807,33 +302,6 @@ static int __init jz_proc_init(void)
|
||||
res->data = NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Reserve a 4MB memory for IPU on JZ4740.
|
||||
*/
|
||||
jz_imem_base = (unsigned int)__get_free_pages(GFP_KERNEL, IMEM_MAX_ORDER);
|
||||
if (jz_imem_base) {
|
||||
/* imem (IPU memory management) */
|
||||
res = create_proc_entry("imem", 0644, proc_jz_root);
|
||||
if (res) {
|
||||
res->read_proc = imem_read_proc;
|
||||
res->write_proc = imem_write_proc;
|
||||
res->data = NULL;
|
||||
}
|
||||
|
||||
/* Set page reserved */
|
||||
virt_addr = jz_imem_base;
|
||||
for (i = 0; i < (1 << IMEM_MAX_ORDER); i++) {
|
||||
SetPageReserved(virt_to_page((void *)virt_addr));
|
||||
virt_addr += PAGE_SIZE;
|
||||
}
|
||||
|
||||
/* Convert to physical address */
|
||||
jz_imem_base = virt_to_phys((void *)jz_imem_base);
|
||||
|
||||
printk("Total %dMB memory at 0x%x was reserved for IPU\n",
|
||||
(unsigned int)((1 << IMEM_MAX_ORDER) * PAGE_SIZE)/1000000, jz_imem_base);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user