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-rw-r--r--arch/blackfin/kernel/cplb-nompu/cplbinit.c521
1 files changed, 114 insertions, 407 deletions
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c
index 2debc900e246..0e28f7595733 100644
--- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c
+++ b/arch/blackfin/kernel/cplb-nompu/cplbinit.c
@@ -20,445 +20,152 @@
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
#include <linux/module.h>
#include <asm/blackfin.h>
#include <asm/cacheflush.h>
#include <asm/cplb.h>
#include <asm/cplbinit.h>
+#include <asm/mem_map.h>
-#define CPLB_MEM CONFIG_MAX_MEM_SIZE
-
-/*
-* Number of required data CPLB switchtable entries
-* MEMSIZE / 4 (we mostly install 4M page size CPLBs
-* approx 16 for smaller 1MB page size CPLBs for allignment purposes
-* 1 for L1 Data Memory
-* possibly 1 for L2 Data Memory
-* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO
-* 1 for ASYNC Memory
-*/
-#define MAX_SWITCH_D_CPLBS (((CPLB_MEM / 4) + 16 + 1 + 1 + 1 \
- + ASYNC_MEMORY_CPLB_COVERAGE) * 2)
-
-/*
-* Number of required instruction CPLB switchtable entries
-* MEMSIZE / 4 (we mostly install 4M page size CPLBs
-* approx 12 for smaller 1MB page size CPLBs for allignment purposes
-* 1 for L1 Instruction Memory
-* possibly 1 for L2 Instruction Memory
-* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO
-*/
-#define MAX_SWITCH_I_CPLBS (((CPLB_MEM / 4) + 12 + 1 + 1 + 1) * 2)
-
-
-u_long icplb_table[MAX_CPLBS + 1];
-u_long dcplb_table[MAX_CPLBS + 1];
-
-#ifdef CONFIG_CPLB_SWITCH_TAB_L1
-# define PDT_ATTR __attribute__((l1_data))
-#else
-# define PDT_ATTR
-#endif
-
-u_long ipdt_table[MAX_SWITCH_I_CPLBS + 1] PDT_ATTR;
-u_long dpdt_table[MAX_SWITCH_D_CPLBS + 1] PDT_ATTR;
+struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
+struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
-#ifdef CONFIG_CPLB_INFO
-u_long ipdt_swapcount_table[MAX_SWITCH_I_CPLBS] PDT_ATTR;
-u_long dpdt_swapcount_table[MAX_SWITCH_D_CPLBS] PDT_ATTR;
-#endif
+int first_switched_icplb PDT_ATTR;
+int first_switched_dcplb PDT_ATTR;
-struct s_cplb {
- struct cplb_tab init_i;
- struct cplb_tab init_d;
- struct cplb_tab switch_i;
- struct cplb_tab switch_d;
-};
+struct cplb_boundary dcplb_bounds[9] PDT_ATTR;
+struct cplb_boundary icplb_bounds[7] PDT_ATTR;
-#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
-static struct cplb_desc cplb_data[] = {
- {
- .start = 0,
- .end = SIZE_1K,
- .psize = SIZE_1K,
- .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = SDRAM_OOPS,
- .d_conf = SDRAM_OOPS,
-#if defined(CONFIG_DEBUG_HUNT_FOR_ZERO)
- .valid = 1,
-#else
- .valid = 0,
-#endif
- .name = "Zero Pointer Guard Page",
- },
- {
- .start = L1_CODE_START,
- .end = L1_CODE_START + L1_CODE_LENGTH,
- .psize = SIZE_4M,
- .attr = INITIAL_T | SWITCH_T | I_CPLB,
- .i_conf = L1_IMEMORY,
- .d_conf = 0,
- .valid = 1,
- .name = "L1 I-Memory",
- },
- {
- .start = L1_DATA_A_START,
- .end = L1_DATA_B_START + L1_DATA_B_LENGTH,
- .psize = SIZE_4M,
- .attr = INITIAL_T | SWITCH_T | D_CPLB,
- .i_conf = 0,
- .d_conf = L1_DMEMORY,
-#if ((L1_DATA_A_LENGTH > 0) || (L1_DATA_B_LENGTH > 0))
- .valid = 1,
-#else
- .valid = 0,
-#endif
- .name = "L1 D-Memory",
- },
- {
- .start = 0,
- .end = 0, /* dynamic */
- .psize = 0,
- .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = SDRAM_IGENERIC,
- .d_conf = SDRAM_DGENERIC,
- .valid = 1,
- .name = "Kernel Memory",
- },
- {
- .start = 0, /* dynamic */
- .end = 0, /* dynamic */
- .psize = 0,
- .attr = INITIAL_T | SWITCH_T | D_CPLB,
- .i_conf = SDRAM_IGENERIC,
- .d_conf = SDRAM_DNON_CHBL,
- .valid = 1,
- .name = "uClinux MTD Memory",
- },
- {
- .start = 0, /* dynamic */
- .end = 0, /* dynamic */
- .psize = SIZE_1M,
- .attr = INITIAL_T | SWITCH_T | D_CPLB,
- .d_conf = SDRAM_DNON_CHBL,
- .valid = 1,
- .name = "Uncached DMA Zone",
- },
- {
- .start = 0, /* dynamic */
- .end = 0, /* dynamic */
- .psize = 0,
- .attr = SWITCH_T | D_CPLB,
- .i_conf = 0, /* dynamic */
- .d_conf = 0, /* dynamic */
- .valid = 1,
- .name = "Reserved Memory",
- },
- {
- .start = ASYNC_BANK0_BASE,
- .end = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE,
- .psize = 0,
- .attr = SWITCH_T | D_CPLB,
- .d_conf = SDRAM_EBIU,
- .valid = 1,
- .name = "Asynchronous Memory Banks",
- },
- {
- .start = L2_START,
- .end = L2_START + L2_LENGTH,
- .psize = SIZE_1M,
- .attr = SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = L2_IMEMORY,
- .d_conf = L2_DMEMORY,
- .valid = (L2_LENGTH > 0),
- .name = "L2 Memory",
- },
- {
- .start = BOOT_ROM_START,
- .end = BOOT_ROM_START + BOOT_ROM_LENGTH,
- .psize = SIZE_1M,
- .attr = SWITCH_T | I_CPLB | D_CPLB,
- .i_conf = SDRAM_IGENERIC,
- .d_conf = SDRAM_DGENERIC,
- .valid = 1,
- .name = "On-Chip BootROM",
- },
-};
+int icplb_nr_bounds PDT_ATTR;
+int dcplb_nr_bounds PDT_ATTR;
-static u16 __init lock_kernel_check(u32 start, u32 end)
+void __init generate_cplb_tables_cpu(unsigned int cpu)
{
- if (start >= (u32)_end || end <= (u32)_stext)
- return 0;
+ int i_d, i_i;
+ unsigned long addr;
- /* This cplb block overlapped with kernel area. */
- return IN_KERNEL;
-}
+ struct cplb_entry *d_tbl = dcplb_tbl[cpu];
+ struct cplb_entry *i_tbl = icplb_tbl[cpu];
-static unsigned short __init
-fill_cplbtab(struct cplb_tab *table,
- unsigned long start, unsigned long end,
- unsigned long block_size, unsigned long cplb_data)
-{
- int i;
+ printk(KERN_INFO "NOMPU: setting up cplb tables\n");
- switch (block_size) {
- case SIZE_4M:
- i = 3;
- break;
- case SIZE_1M:
- i = 2;
- break;
- case SIZE_4K:
- i = 1;
- break;
- case SIZE_1K:
- default:
- i = 0;
- break;
- }
-
- cplb_data = (cplb_data & ~(3 << 16)) | (i << 16);
-
- while ((start < end) && (table->pos < table->size)) {
+ i_d = i_i = 0;
- table->tab[table->pos++] = start;
+ /* Set up the zero page. */
+ d_tbl[i_d].addr = 0;
+ d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
- if (lock_kernel_check(start, start + block_size) == IN_KERNEL)
- table->tab[table->pos++] =
- cplb_data | CPLB_LOCK | CPLB_DIRTY;
- else
- table->tab[table->pos++] = cplb_data;
+ /* Cover kernel memory with 4M pages. */
+ addr = 0;
- start += block_size;
+ for (; addr < memory_start; addr += 4 * 1024 * 1024) {
+ d_tbl[i_d].addr = addr;
+ d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB;
+ i_tbl[i_i].addr = addr;
+ i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB;
}
- return 0;
-}
-static unsigned short __init
-close_cplbtab(struct cplb_tab *table)
-{
-
- while (table->pos < table->size) {
-
- table->tab[table->pos++] = 0;
- table->tab[table->pos++] = 0; /* !CPLB_VALID */
+ /* Cover L1 memory. One 4M area for code and data each is enough. */
+ if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) {
+ d_tbl[i_d].addr = L1_DATA_A_START;
+ d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB;
}
- return 0;
-}
+ i_tbl[i_i].addr = L1_CODE_START;
+ i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
-/* helper function */
-static void __init
-__fill_code_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end)
-{
- if (cplb_data[i].psize) {
- fill_cplbtab(t,
- cplb_data[i].start,
- cplb_data[i].end,
- cplb_data[i].psize,
- cplb_data[i].i_conf);
- } else {
-#if defined(CONFIG_BFIN_ICACHE)
- if (ANOMALY_05000263 && i == SDRAM_KERN) {
- fill_cplbtab(t,
- cplb_data[i].start,
- cplb_data[i].end,
- SIZE_4M,
- cplb_data[i].i_conf);
- } else
-#endif
- {
- fill_cplbtab(t,
- cplb_data[i].start,
- a_start,
- SIZE_1M,
- cplb_data[i].i_conf);
- fill_cplbtab(t,
- a_start,
- a_end,
- SIZE_4M,
- cplb_data[i].i_conf);
- fill_cplbtab(t, a_end,
- cplb_data[i].end,
- SIZE_1M,
- cplb_data[i].i_conf);
- }
- }
-}
+ first_switched_dcplb = i_d;
+ first_switched_icplb = i_i;
-static void __init
-__fill_data_cplbtab(struct cplb_tab *t, int i, u32 a_start, u32 a_end)
-{
- if (cplb_data[i].psize) {
- fill_cplbtab(t,
- cplb_data[i].start,
- cplb_data[i].end,
- cplb_data[i].psize,
- cplb_data[i].d_conf);
- } else {
- fill_cplbtab(t,
- cplb_data[i].start,
- a_start, SIZE_1M,
- cplb_data[i].d_conf);
- fill_cplbtab(t, a_start,
- a_end, SIZE_4M,
- cplb_data[i].d_conf);
- fill_cplbtab(t, a_end,
- cplb_data[i].end,
- SIZE_1M,
- cplb_data[i].d_conf);
- }
+ BUG_ON(first_switched_dcplb > MAX_CPLBS);
+ BUG_ON(first_switched_icplb > MAX_CPLBS);
+
+ while (i_d < MAX_CPLBS)
+ d_tbl[i_d++].data = 0;
+ while (i_i < MAX_CPLBS)
+ i_tbl[i_i++].data = 0;
}
-void __init generate_cplb_tables(void)
+void __init generate_cplb_tables_all(void)
{
+ int i_d, i_i;
- u16 i, j, process;
- u32 a_start, a_end, as, ae, as_1m;
-
- struct cplb_tab *t_i = NULL;
- struct cplb_tab *t_d = NULL;
- struct s_cplb cplb;
-
- printk(KERN_INFO "NOMPU: setting up cplb tables for global access\n");
-
- cplb.init_i.size = MAX_CPLBS;
- cplb.init_d.size = MAX_CPLBS;
- cplb.switch_i.size = MAX_SWITCH_I_CPLBS;
- cplb.switch_d.size = MAX_SWITCH_D_CPLBS;
-
- cplb.init_i.pos = 0;
- cplb.init_d.pos = 0;
- cplb.switch_i.pos = 0;
- cplb.switch_d.pos = 0;
-
- cplb.init_i.tab = icplb_table;
- cplb.init_d.tab = dcplb_table;
- cplb.switch_i.tab = ipdt_table;
- cplb.switch_d.tab = dpdt_table;
-
- cplb_data[SDRAM_KERN].end = memory_end;
-
+ i_d = 0;
+ /* Normal RAM, including MTD FS. */
#ifdef CONFIG_MTD_UCLINUX
- cplb_data[SDRAM_RAM_MTD].start = memory_mtd_start;
- cplb_data[SDRAM_RAM_MTD].end = memory_mtd_start + mtd_size;
- cplb_data[SDRAM_RAM_MTD].valid = mtd_size > 0;
-# if defined(CONFIG_ROMFS_FS)
- cplb_data[SDRAM_RAM_MTD].attr |= I_CPLB;
-
- /*
- * The ROMFS_FS size is often not multiple of 1MB.
- * This can cause multiple CPLB sets covering the same memory area.
- * This will then cause multiple CPLB hit exceptions.
- * Workaround: We ensure a contiguous memory area by extending the kernel
- * memory section over the mtd section.
- * For ROMFS_FS memory must be covered with ICPLBs anyways.
- * So there is no difference between kernel and mtd memory setup.
- */
-
- cplb_data[SDRAM_KERN].end = memory_mtd_start + mtd_size;;
- cplb_data[SDRAM_RAM_MTD].valid = 0;
-
-# endif
+ dcplb_bounds[i_d].eaddr = memory_mtd_start + mtd_size;
#else
- cplb_data[SDRAM_RAM_MTD].valid = 0;
+ dcplb_bounds[i_d].eaddr = memory_end;
#endif
+ dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
+ /* DMA uncached region. */
+ if (DMA_UNCACHED_REGION) {
+ dcplb_bounds[i_d].eaddr = _ramend;
+ dcplb_bounds[i_d++].data = SDRAM_DNON_CHBL;
+ }
+ if (_ramend != physical_mem_end) {
+ /* Reserved memory. */
+ dcplb_bounds[i_d].eaddr = physical_mem_end;
+ dcplb_bounds[i_d++].data = (reserved_mem_dcache_on ?
+ SDRAM_DGENERIC : SDRAM_DNON_CHBL);
+ }
+ /* Addressing hole up to the async bank. */
+ dcplb_bounds[i_d].eaddr = ASYNC_BANK0_BASE;
+ dcplb_bounds[i_d++].data = 0;
+ /* ASYNC banks. */
+ dcplb_bounds[i_d].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE;
+ dcplb_bounds[i_d++].data = SDRAM_EBIU;
+ /* Addressing hole up to BootROM. */
+ dcplb_bounds[i_d].eaddr = BOOT_ROM_START;
+ dcplb_bounds[i_d++].data = 0;
+ /* BootROM -- largest one should be less than 1 meg. */
+ dcplb_bounds[i_d].eaddr = BOOT_ROM_START + (1 * 1024 * 1024);
+ dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
+ if (L2_LENGTH) {
+ /* Addressing hole up to L2 SRAM. */
+ dcplb_bounds[i_d].eaddr = L2_START;
+ dcplb_bounds[i_d++].data = 0;
+ /* L2 SRAM. */
+ dcplb_bounds[i_d].eaddr = L2_START + L2_LENGTH;
+ dcplb_bounds[i_d++].data = L2_DMEMORY;
+ }
+ dcplb_nr_bounds = i_d;
+ BUG_ON(dcplb_nr_bounds > ARRAY_SIZE(dcplb_bounds));
- cplb_data[SDRAM_DMAZ].start = _ramend - DMA_UNCACHED_REGION;
- cplb_data[SDRAM_DMAZ].end = _ramend;
-
- cplb_data[RES_MEM].start = _ramend;
- cplb_data[RES_MEM].end = physical_mem_end;
-
- if (reserved_mem_dcache_on)
- cplb_data[RES_MEM].d_conf = SDRAM_DGENERIC;
- else
- cplb_data[RES_MEM].d_conf = SDRAM_DNON_CHBL;
-
- if (reserved_mem_icache_on)
- cplb_data[RES_MEM].i_conf = SDRAM_IGENERIC;
- else
- cplb_data[RES_MEM].i_conf = SDRAM_INON_CHBL;
-
- for (i = ZERO_P; i < ARRAY_SIZE(cplb_data); ++i) {
- if (!cplb_data[i].valid)
- continue;
-
- as_1m = cplb_data[i].start % SIZE_1M;
-
- /* We need to make sure all sections are properly 1M aligned
- * However between Kernel Memory and the Kernel mtd section, depending on the
- * rootfs size, there can be overlapping memory areas.
- */
-
- if (as_1m && i != L1I_MEM && i != L1D_MEM) {
+ i_i = 0;
+ /* Normal RAM, including MTD FS. */
#ifdef CONFIG_MTD_UCLINUX
- if (i == SDRAM_RAM_MTD) {
- if ((cplb_data[SDRAM_KERN].end + 1) > cplb_data[SDRAM_RAM_MTD].start)
- cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M)) + SIZE_1M;
- else
- cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M));
- } else
+ icplb_bounds[i_i].eaddr = memory_mtd_start + mtd_size;
+#else
+ icplb_bounds[i_i].eaddr = memory_end;
#endif
- printk(KERN_WARNING "Unaligned Start of %s at 0x%X\n",
- cplb_data[i].name, cplb_data[i].start);
- }
-
- as = cplb_data[i].start % SIZE_4M;
- ae = cplb_data[i].end % SIZE_4M;
-
- if (as)
- a_start = cplb_data[i].start + (SIZE_4M - (as));
- else
- a_start = cplb_data[i].start;
-
- a_end = cplb_data[i].end - ae;
-
- for (j = INITIAL_T; j <= SWITCH_T; j++) {
-
- switch (j) {
- case INITIAL_T:
- if (cplb_data[i].attr & INITIAL_T) {
- t_i = &cplb.init_i;
- t_d = &cplb.init_d;
- process = 1;
- } else
- process = 0;
- break;
- case SWITCH_T:
- if (cplb_data[i].attr & SWITCH_T) {
- t_i = &cplb.switch_i;
- t_d = &cplb.switch_d;
- process = 1;
- } else
- process = 0;
- break;
- default:
- process = 0;
- break;
- }
-
- if (!process)
- continue;
- if (cplb_data[i].attr & I_CPLB)
- __fill_code_cplbtab(t_i, i, a_start, a_end);
-
- if (cplb_data[i].attr & D_CPLB)
- __fill_data_cplbtab(t_d, i, a_start, a_end);
- }
+ icplb_bounds[i_i++].data = SDRAM_IGENERIC;
+ /* DMA uncached region. */
+ if (DMA_UNCACHED_REGION) {
+ icplb_bounds[i_i].eaddr = _ramend;
+ icplb_bounds[i_i++].data = 0;
}
-
-/* close tables */
-
- close_cplbtab(&cplb.init_i);
- close_cplbtab(&cplb.init_d);
-
- cplb.init_i.tab[cplb.init_i.pos] = -1;
- cplb.init_d.tab[cplb.init_d.pos] = -1;
- cplb.switch_i.tab[cplb.switch_i.pos] = -1;
- cplb.switch_d.tab[cplb.switch_d.pos] = -1;
-
+ if (_ramend != physical_mem_end) {
+ /* Reserved memory. */
+ icplb_bounds[i_i].eaddr = physical_mem_end;
+ icplb_bounds[i_i++].data = (reserved_mem_icache_on ?
+ SDRAM_IGENERIC : SDRAM_INON_CHBL);
+ }
+ /* Addressing hole up to BootROM. */
+ icplb_bounds[i_i].eaddr = BOOT_ROM_START;
+ icplb_bounds[i_i++].data = 0;
+ /* BootROM -- largest one should be less than 1 meg. */
+ icplb_bounds[i_i].eaddr = BOOT_ROM_START + (1 * 1024 * 1024);
+ icplb_bounds[i_i++].data = SDRAM_IGENERIC;
+ if (L2_LENGTH) {
+ /* Addressing hole up to L2 SRAM, including the async bank. */
+ icplb_bounds[i_i].eaddr = L2_START;
+ icplb_bounds[i_i++].data = 0;
+ /* L2 SRAM. */
+ icplb_bounds[i_i].eaddr = L2_START + L2_LENGTH;
+ icplb_bounds[i_i++].data = L2_IMEMORY;
+ }
+ icplb_nr_bounds = i_i;
+ BUG_ON(icplb_nr_bounds > ARRAY_SIZE(icplb_bounds));
}
-
-#endif
-
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-26 22:39:41 +0000