* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
* Copyright (C) 1997, 2001 Ralf Baechle (ralf@gnu.org)
* Copyright (C) 2000 SiByte, Inc.
+ * Copyright (C) 2005 Thiemo Seufer
*
* Written by Justin Carlson of SiByte, Inc.
* and Kip Walker of Broadcom Corp.
#define SB1_PREF_STORE_STREAMED_HINT "5"
#endif
-#ifdef CONFIG_SIBYTE_DMA_PAGEOPS
static inline void clear_page_cpu(void *page)
-#else
-void clear_page(void *page)
-#endif
{
unsigned char *addr = (unsigned char *) page;
unsigned char *end = addr + PAGE_SIZE;
* since we know we're on an SB1, we force the assembler to take
* 64-bit operands to speed things up
*/
- do {
- __asm__ __volatile__(
- " .set mips4 \n"
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set mips4 \n"
+ " .set noreorder \n"
#ifdef CONFIG_CPU_HAS_PREFETCH
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 0(%0) \n" /* Prefetch the first 4 lines */
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 32(%0) \n"
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 64(%0) \n"
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 96(%0) \n"
+ " daddiu %0, %0, 128 \n"
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -128(%0) \n"
+ /* Prefetch the first 4 lines */
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -96(%0) \n"
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -64(%0) \n"
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -32(%0) \n"
+ "1: sd $0, -128(%0) \n" /* Throw out a cacheline of 0's */
+ " sd $0, -120(%0) \n"
+ " sd $0, -112(%0) \n"
+ " sd $0, -104(%0) \n"
+ " daddiu %0, %0, 32 \n"
+ " bnel %0, %1, 1b \n"
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -32(%0) \n"
+ " daddiu %0, %0, -128 \n"
#endif
- "1: sd $0, 0(%0) \n" /* Throw out a cacheline of 0's */
- " sd $0, 8(%0) \n"
- " sd $0, 16(%0) \n"
- " sd $0, 24(%0) \n"
-#ifdef CONFIG_CPU_HAS_PREFETCH
- " pref " SB1_PREF_STORE_STREAMED_HINT ",128(%0) \n" /* Prefetch 4 lines ahead */
-#endif
- " .set mips0 \n"
- :
- : "r" (addr)
- : "memory");
- addr += 32;
- } while (addr != end);
+ " sd $0, 0(%0) \n" /* Throw out a cacheline of 0's */
+ "1: sd $0, 8(%0) \n"
+ " sd $0, 16(%0) \n"
+ " sd $0, 24(%0) \n"
+ " daddiu %0, %0, 32 \n"
+ " bnel %0, %1, 1b \n"
+ " sd $0, 0(%0) \n"
+ " .set pop \n"
+ : "+r" (addr)
+ : "r" (end)
+ : "memory");
}
-#ifdef CONFIG_SIBYTE_DMA_PAGEOPS
static inline void copy_page_cpu(void *to, void *from)
-#else
-void copy_page(void *to, void *from)
-#endif
{
- unsigned char *src = from;
- unsigned char *dst = to;
+ unsigned char *src = (unsigned char *)from;
+ unsigned char *dst = (unsigned char *)to;
unsigned char *end = src + PAGE_SIZE;
/*
- * This should be optimized in assembly...can't use ld/sd, though,
- * because the top 32 bits could be nuked if we took an interrupt
- * during the routine. And this is not a good place to be cli()'ing
- *
* The pref's used here are using "streaming" hints, which cause the
* copied data to be kicked out of the cache sooner. A page copy often
* ends up copying a lot more data than is commonly used, so this seems
* to make sense in terms of reducing cache pollution, but I've no real
* performance data to back this up
*/
-
- do {
- __asm__ __volatile__(
- " .set mips4 \n"
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set mips4 \n"
+ " .set noreorder \n"
#ifdef CONFIG_CPU_HAS_PREFETCH
- " pref " SB1_PREF_LOAD_STREAMED_HINT ", 0(%0)\n" /* Prefetch the first 3 lines */
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 0(%1)\n"
- " pref " SB1_PREF_LOAD_STREAMED_HINT ", 32(%0)\n"
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 32(%1)\n"
- " pref " SB1_PREF_LOAD_STREAMED_HINT ", 64(%0)\n"
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 64(%1)\n"
+ " daddiu %0, %0, 128 \n"
+ " daddiu %1, %1, 128 \n"
+ " pref " SB1_PREF_LOAD_STREAMED_HINT ", -128(%0)\n"
+ /* Prefetch the first 4 lines */
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -128(%1)\n"
+ " pref " SB1_PREF_LOAD_STREAMED_HINT ", -96(%0)\n"
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -96(%1)\n"
+ " pref " SB1_PREF_LOAD_STREAMED_HINT ", -64(%0)\n"
+ " pref " SB1_PREF_STORE_STREAMED_HINT ", -64(%1)\n"
+ " pref " SB1_PREF_LOAD_STREAMED_HINT ", -32(%0)\n"
+ "1: pref " SB1_PREF_STORE_STREAMED_HINT ", -32(%1)\n"
+# ifdef CONFIG_64BIT
+ " ld $8, -128(%0) \n" /* Block copy a cacheline */
+ " ld $9, -120(%0) \n"
+ " ld $10, -112(%0) \n"
+ " ld $11, -104(%0) \n"
+ " sd $8, -128(%1) \n"
+ " sd $9, -120(%1) \n"
+ " sd $10, -112(%1) \n"
+ " sd $11, -104(%1) \n"
+# else
+ " lw $2, -128(%0) \n" /* Block copy a cacheline */
+ " lw $3, -124(%0) \n"
+ " lw $6, -120(%0) \n"
+ " lw $7, -116(%0) \n"
+ " lw $8, -112(%0) \n"
+ " lw $9, -108(%0) \n"
+ " lw $10, -104(%0) \n"
+ " lw $11, -100(%0) \n"
+ " sw $2, -128(%1) \n"
+ " sw $3, -124(%1) \n"
+ " sw $6, -120(%1) \n"
+ " sw $7, -116(%1) \n"
+ " sw $8, -112(%1) \n"
+ " sw $9, -108(%1) \n"
+ " sw $10, -104(%1) \n"
+ " sw $11, -100(%1) \n"
+# endif
+ " daddiu %0, %0, 32 \n"
+ " daddiu %1, %1, 32 \n"
+ " bnel %0, %2, 1b \n"
+ " pref " SB1_PREF_LOAD_STREAMED_HINT ", -32(%0)\n"
+ " daddiu %0, %0, -128 \n"
+ " daddiu %1, %1, -128 \n"
#endif
- "1: lw $2, 0(%0) \n" /* Block copy a cacheline */
- " lw $3, 4(%0) \n"
- " lw $4, 8(%0) \n"
- " lw $5, 12(%0) \n"
- " lw $6, 16(%0) \n"
- " lw $7, 20(%0) \n"
- " lw $8, 24(%0) \n"
- " lw $9, 28(%0) \n"
-#ifdef CONFIG_CPU_HAS_PREFETCH
- " pref " SB1_PREF_LOAD_STREAMED_HINT ", 96(%0) \n" /* Prefetch ahead */
- " pref " SB1_PREF_STORE_STREAMED_HINT ", 96(%1) \n"
+#ifdef CONFIG_64BIT
+ " ld $8, 0(%0) \n" /* Block copy a cacheline */
+ "1: ld $9, 8(%0) \n"
+ " ld $10, 16(%0) \n"
+ " ld $11, 24(%0) \n"
+ " sd $8, 0(%1) \n"
+ " sd $9, 8(%1) \n"
+ " sd $10, 16(%1) \n"
+ " sd $11, 24(%1) \n"
+#else
+ " lw $2, 0(%0) \n" /* Block copy a cacheline */
+ "1: lw $3, 4(%0) \n"
+ " lw $6, 8(%0) \n"
+ " lw $7, 12(%0) \n"
+ " lw $8, 16(%0) \n"
+ " lw $9, 20(%0) \n"
+ " lw $10, 24(%0) \n"
+ " lw $11, 28(%0) \n"
+ " sw $2, 0(%1) \n"
+ " sw $3, 4(%1) \n"
+ " sw $6, 8(%1) \n"
+ " sw $7, 12(%1) \n"
+ " sw $8, 16(%1) \n"
+ " sw $9, 20(%1) \n"
+ " sw $10, 24(%1) \n"
+ " sw $11, 28(%1) \n"
+#endif
+ " daddiu %0, %0, 32 \n"
+ " daddiu %1, %1, 32 \n"
+ " bnel %0, %2, 1b \n"
+#ifdef CONFIG_64BIT
+ " ld $8, 0(%0) \n"
+#else
+ " lw $2, 0(%0) \n"
+#endif
+ " .set pop \n"
+ : "+r" (src), "+r" (dst)
+ : "r" (end)
+#ifdef CONFIG_64BIT
+ : "$8","$9","$10","$11","memory");
+#else
+ : "$2","$3","$6","$7","$8","$9","$10","$11","memory");
#endif
- " sw $2, 0(%1) \n"
- " sw $3, 4(%1) \n"
- " sw $4, 8(%1) \n"
- " sw $5, 12(%1) \n"
- " sw $6, 16(%1) \n"
- " sw $7, 20(%1) \n"
- " sw $8, 24(%1) \n"
- " sw $9, 28(%1) \n"
- " .set mips0 \n"
- :
- : "r" (src), "r" (dst)
- : "$2","$3","$4","$5","$6","$7","$8","$9","memory");
- src += 32;
- dst += 32;
- } while (src != end);
}
/*
* Pad descriptors to cacheline, since each is exclusively owned by a
- * particular CPU.
+ * particular CPU.
*/
typedef struct dmadscr_s {
- uint64_t dscr_a;
- uint64_t dscr_b;
- uint64_t pad_a;
- uint64_t pad_b;
+ u64 dscr_a;
+ u64 dscr_b;
+ u64 pad_a;
+ u64 pad_b;
} dmadscr_t;
-static dmadscr_t page_descr[NR_CPUS] __attribute__((aligned(SMP_CACHE_BYTES)));
+static dmadscr_t page_descr[DM_NUM_CHANNELS]
+ __attribute__((aligned(SMP_CACHE_BYTES)));
void sb1_dma_init(void)
{
- int cpu = smp_processor_id();
- uint64_t base_val = PHYSADDR(&page_descr[cpu]) | V_DM_DSCR_BASE_RINGSZ(1);
-
- __raw_writeq(base_val,
- IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE)));
- __raw_writeq(base_val | M_DM_DSCR_BASE_RESET,
- IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE)));
- __raw_writeq(base_val | M_DM_DSCR_BASE_ENABL,
- IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE)));
+ int i;
+
+ for (i = 0; i < DM_NUM_CHANNELS; i++) {
+ const u64 base_val = CPHYSADDR(&page_descr[i]) |
+ V_DM_DSCR_BASE_RINGSZ(1);
+ volatile void *base_reg =
+ IOADDR(A_DM_REGISTER(i, R_DM_DSCR_BASE));
+
+ __raw_writeq(base_val, base_reg);
+ __raw_writeq(base_val | M_DM_DSCR_BASE_RESET, base_reg);
+ __raw_writeq(base_val | M_DM_DSCR_BASE_ENABL, base_reg);
+ }
}
void clear_page(void *page)
{
- int cpu = smp_processor_id();
+ u64 to_phys = CPHYSADDR(page);
+ unsigned int cpu = smp_processor_id();
- /* if the page is above Kseg0, use old way */
- if (KSEGX(page) != CAC_BASE)
+ /* if the page is not in KSEG0, use old way */
+ if ((long)KSEGX(page) != (long)CKSEG0)
return clear_page_cpu(page);
- page_descr[cpu].dscr_a = PHYSADDR(page) | M_DM_DSCRA_ZERO_MEM | M_DM_DSCRA_L2C_DEST | M_DM_DSCRA_INTERRUPT;
+ page_descr[cpu].dscr_a = to_phys | M_DM_DSCRA_ZERO_MEM |
+ M_DM_DSCRA_L2C_DEST | M_DM_DSCRA_INTERRUPT;
page_descr[cpu].dscr_b = V_DM_DSCRB_SRC_LENGTH(PAGE_SIZE);
__raw_writeq(1, IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_COUNT)));
* Don't really want to do it this way, but there's no
* reliable way to delay completion detection.
*/
- while (!(__raw_readq(IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE_DEBUG)) & M_DM_DSCR_BASE_INTERRUPT)))
+ while (!(__raw_readq(IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE_DEBUG)))
+ & M_DM_DSCR_BASE_INTERRUPT))
;
__raw_readq(IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE)));
}
void copy_page(void *to, void *from)
{
- unsigned long from_phys = PHYSADDR(from);
- unsigned long to_phys = PHYSADDR(to);
- int cpu = smp_processor_id();
+ u64 from_phys = CPHYSADDR(from);
+ u64 to_phys = CPHYSADDR(to);
+ unsigned int cpu = smp_processor_id();
- /* if either page is above Kseg0, use old way */
- if ((KSEGX(to) != CAC_BASE) || (KSEGX(from) != CAC_BASE))
+ /* if any page is not in KSEG0, use old way */
+ if ((long)KSEGX(to) != (long)CKSEG0
+ || (long)KSEGX(from) != (long)CKSEG0)
return copy_page_cpu(to, from);
- page_descr[cpu].dscr_a = PHYSADDR(to_phys) | M_DM_DSCRA_L2C_DEST | M_DM_DSCRA_INTERRUPT;
- page_descr[cpu].dscr_b = PHYSADDR(from_phys) | V_DM_DSCRB_SRC_LENGTH(PAGE_SIZE);
+ page_descr[cpu].dscr_a = to_phys | M_DM_DSCRA_L2C_DEST |
+ M_DM_DSCRA_INTERRUPT;
+ page_descr[cpu].dscr_b = from_phys | V_DM_DSCRB_SRC_LENGTH(PAGE_SIZE);
__raw_writeq(1, IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_COUNT)));
/*
* Don't really want to do it this way, but there's no
* reliable way to delay completion detection.
*/
- while (!(__raw_readq(IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE_DEBUG)) & M_DM_DSCR_BASE_INTERRUPT)))
+ while (!(__raw_readq(IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE_DEBUG)))
+ & M_DM_DSCR_BASE_INTERRUPT))
;
__raw_readq(IOADDR(A_DM_REGISTER(cpu, R_DM_DSCR_BASE)));
}
-#endif
+#else /* !CONFIG_SIBYTE_DMA_PAGEOPS */
+
+void clear_page(void *page)
+{
+ return clear_page_cpu(page);
+}
+
+void copy_page(void *to, void *from)
+{
+ return copy_page_cpu(to, from);
+}
+
+#endif /* !CONFIG_SIBYTE_DMA_PAGEOPS */
EXPORT_SYMBOL(clear_page);
EXPORT_SYMBOL(copy_page);
git://git.onelab.eu / linux-2.6.git / blobdiff