diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv8/zynqmp/cpu.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/zynqmp/cpu.c b/arch/arm/cpu/armv8/zynqmp/cpu.c index 6fae03c1af..11958fea6f 100644 --- a/arch/arm/cpu/armv8/zynqmp/cpu.c +++ b/arch/arm/cpu/armv8/zynqmp/cpu.c @@ -26,3 +26,167 @@ unsigned int zynqmp_get_silicon_version(void) return ZYNQMP_CSU_VERSION_EP108; } + +#ifndef CONFIG_SYS_DCACHE_OFF +#include <asm/armv8/mmu.h> + +#define SECTION_SHIFT_L1 30UL +#define SECTION_SHIFT_L2 21UL +#define BLOCK_SIZE_L0 0x8000000000UL +#define BLOCK_SIZE_L1 (1 << SECTION_SHIFT_L1) +#define BLOCK_SIZE_L2 (1 << SECTION_SHIFT_L2) + +#define TCR_TG1_4K (1 << 31) +#define TCR_EPD1_DISABLE (1 << 23) +#define ZYNQMO_VA_BITS 40 +#define ZYNQMP_TCR TCR_TG1_4K | \ + TCR_EPD1_DISABLE | \ + TCR_SHARED_OUTER | \ + TCR_SHARED_INNER | \ + TCR_IRGN_WBWA | \ + TCR_ORGN_WBWA | \ + TCR_T0SZ(ZYNQMO_VA_BITS) + +#define MEMORY_ATTR PMD_SECT_AF | PMD_SECT_INNER_SHARE | \ + PMD_ATTRINDX(MT_NORMAL) | \ + PMD_TYPE_SECT +#define DEVICE_ATTR PMD_SECT_AF | PMD_SECT_PXN | \ + PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_NGNRNE) | \ + PMD_TYPE_SECT + +/* 4K size is required to place 512 entries in each level */ +#define TLB_TABLE_SIZE 0x1000 + +struct attr_tbl { + u32 num; + u64 attr; +}; + +static struct attr_tbl attr_tbll1t0[4] = { {16, 0x0}, + {8, DEVICE_ATTR}, + {32, MEMORY_ATTR}, + {456, DEVICE_ATTR} + }; +static struct attr_tbl attr_tbll2t3[4] = { {0x180, DEVICE_ATTR}, + {0x40, 0x0}, + {0x3F, DEVICE_ATTR}, + {0x1, MEMORY_ATTR} + }; + +/* + * This mmu table looks as below + * Level 0 table contains two entries to 512GB sizes. One is Level1 Table 0 + * and other Level1 Table1. + * Level1 Table0 contains entries for each 1GB from 0 to 511GB. + * Level1 Table1 contains entries for each 1GB from 512GB to 1TB. + * Level2 Table0, Level2 Table1, Level2 Table2 and Level2 Table3 contains + * entries for each 2MB starting from 0GB, 1GB, 2GB and 3GB respectively. + */ +static void zynqmp_mmu_setup(void) +{ + int el; + u32 index_attr; + u64 i, section_l1t0, section_l1t1; + u64 section_l2t0, section_l2t1, section_l2t2, section_l2t3; + u64 *level0_table = (u64 *)gd->arch.tlb_addr; + u64 *level1_table_0 = (u64 *)(gd->arch.tlb_addr + TLB_TABLE_SIZE); + u64 *level1_table_1 = (u64 *)(gd->arch.tlb_addr + (2 * TLB_TABLE_SIZE)); + u64 *level2_table_0 = (u64 *)(gd->arch.tlb_addr + (3 * TLB_TABLE_SIZE)); + u64 *level2_table_1 = (u64 *)(gd->arch.tlb_addr + (4 * TLB_TABLE_SIZE)); + u64 *level2_table_2 = (u64 *)(gd->arch.tlb_addr + (5 * TLB_TABLE_SIZE)); + u64 *level2_table_3 = (u64 *)(gd->arch.tlb_addr + (6 * TLB_TABLE_SIZE)); + + level0_table[0] = + (u64)level1_table_0 | PMD_TYPE_TABLE; + level0_table[1] = + (u64)level1_table_1 | PMD_TYPE_TABLE; + + /* + * set level 1 table 0, covering 0 to 512GB + * set level 1 table 1, covering 512GB to 1TB + */ + section_l1t0 = 0; + section_l1t1 = BLOCK_SIZE_L0; + + index_attr = 0; + for (i = 0; i < 512; i++) { + level1_table_0[i] = section_l1t0; + level1_table_0[i] |= attr_tbll1t0[index_attr].attr; + attr_tbll1t0[index_attr].num--; + if (attr_tbll1t0[index_attr].num == 0) + index_attr++; + level1_table_1[i] = section_l1t1; + level1_table_1[i] |= DEVICE_ATTR; + section_l1t0 += BLOCK_SIZE_L1; + section_l1t1 += BLOCK_SIZE_L1; + } + + level1_table_0[0] = + (u64)level2_table_0 | PMD_TYPE_TABLE; + level1_table_0[1] = + (u64)level2_table_1 | PMD_TYPE_TABLE; + level1_table_0[2] = + (u64)level2_table_2 | PMD_TYPE_TABLE; + level1_table_0[3] = + (u64)level2_table_3 | PMD_TYPE_TABLE; + + section_l2t0 = 0; + section_l2t1 = section_l2t0 + BLOCK_SIZE_L1; /* 1GB */ + section_l2t2 = section_l2t1 + BLOCK_SIZE_L1; /* 2GB */ + section_l2t3 = section_l2t2 + BLOCK_SIZE_L1; /* 3GB */ + + index_attr = 0; + + for (i = 0; i < 512; i++) { + level2_table_0[i] = section_l2t0 | MEMORY_ATTR; + level2_table_1[i] = section_l2t1 | MEMORY_ATTR; + level2_table_2[i] = section_l2t2 | DEVICE_ATTR; + level2_table_3[i] = section_l2t3 | + attr_tbll2t3[index_attr].attr; + attr_tbll2t3[index_attr].num--; + if (attr_tbll2t3[index_attr].num == 0) + index_attr++; + section_l2t0 += BLOCK_SIZE_L2; + section_l2t1 += BLOCK_SIZE_L2; + section_l2t2 += BLOCK_SIZE_L2; + section_l2t3 += BLOCK_SIZE_L2; + } + + /* flush new MMU table */ + flush_dcache_range(gd->arch.tlb_addr, + gd->arch.tlb_addr + gd->arch.tlb_size); + + /* point TTBR to the new table */ + el = current_el(); + set_ttbr_tcr_mair(el, gd->arch.tlb_addr, + ZYNQMP_TCR, MEMORY_ATTRIBUTES); + + set_sctlr(get_sctlr() | CR_M); +} + +int arch_cpu_init(void) +{ + icache_enable(); + __asm_invalidate_dcache_all(); + __asm_invalidate_tlb_all(); + return 0; +} + +/* + * This function is called from lib/board.c. + * It recreates MMU table in main memory. MMU and d-cache are enabled earlier. + * There is no need to disable d-cache for this operation. + */ +void enable_caches(void) +{ + /* The data cache is not active unless the mmu is enabled */ + if (!(get_sctlr() & CR_M)) { + invalidate_dcache_all(); + __asm_invalidate_tlb_all(); + zynqmp_mmu_setup(); + } + puts("Enabling Caches...\n"); + + set_sctlr(get_sctlr() | CR_C); +} +#endif |