diff options
Diffstat (limited to 'arch/nds32/kernel/setup.c')
| -rw-r--r-- | arch/nds32/kernel/setup.c | 382 |
1 files changed, 0 insertions, 382 deletions
diff --git a/arch/nds32/kernel/setup.c b/arch/nds32/kernel/setup.c deleted file mode 100644 index 31d29d92478e..000000000000 --- a/arch/nds32/kernel/setup.c +++ /dev/null @@ -1,382 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// Copyright (C) 2005-2017 Andes Technology Corporation - -#include <linux/cpu.h> -#include <linux/memblock.h> -#include <linux/seq_file.h> -#include <linux/console.h> -#include <linux/screen_info.h> -#include <linux/delay.h> -#include <linux/dma-mapping.h> -#include <linux/of_fdt.h> -#include <linux/of_platform.h> -#include <asm/setup.h> -#include <asm/sections.h> -#include <asm/proc-fns.h> -#include <asm/cache_info.h> -#include <asm/elf.h> -#include <asm/fpu.h> -#include <nds32_intrinsic.h> - -#define HWCAP_MFUSR_PC 0x000001 -#define HWCAP_EXT 0x000002 -#define HWCAP_EXT2 0x000004 -#define HWCAP_FPU 0x000008 -#define HWCAP_AUDIO 0x000010 -#define HWCAP_BASE16 0x000020 -#define HWCAP_STRING 0x000040 -#define HWCAP_REDUCED_REGS 0x000080 -#define HWCAP_VIDEO 0x000100 -#define HWCAP_ENCRYPT 0x000200 -#define HWCAP_EDM 0x000400 -#define HWCAP_LMDMA 0x000800 -#define HWCAP_PFM 0x001000 -#define HWCAP_HSMP 0x002000 -#define HWCAP_TRACE 0x004000 -#define HWCAP_DIV 0x008000 -#define HWCAP_MAC 0x010000 -#define HWCAP_L2C 0x020000 -#define HWCAP_FPU_DP 0x040000 -#define HWCAP_V2 0x080000 -#define HWCAP_DX_REGS 0x100000 -#define HWCAP_HWPRE 0x200000 - -unsigned long cpu_id, cpu_rev, cpu_cfgid; -bool has_fpu = false; -char cpu_series; -char *endianness = NULL; - -unsigned int __atags_pointer __initdata; -unsigned int elf_hwcap; -EXPORT_SYMBOL(elf_hwcap); - -/* - * The following string table, must sync with HWCAP_xx bitmask, - * which is defined in <asm/procinfo.h> - */ -static const char *hwcap_str[] = { - "mfusr_pc", - "perf1", - "perf2", - "fpu", - "audio", - "16b", - "string", - "reduced_regs", - "video", - "encrypt", - "edm", - "lmdma", - "pfm", - "hsmp", - "trace", - "div", - "mac", - "l2c", - "fpu_dp", - "v2", - "dx_regs", - "hw_pre", - NULL, -}; - -#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH -#define WRITE_METHOD "write through" -#else -#define WRITE_METHOD "write back" -#endif - -struct cache_info L1_cache_info[2]; -static void __init dump_cpu_info(int cpu) -{ - int i, p = 0; - char str[sizeof(hwcap_str) + 16]; - - for (i = 0; hwcap_str[i]; i++) { - if (elf_hwcap & (1 << i)) { - sprintf(str + p, "%s ", hwcap_str[i]); - p += strlen(hwcap_str[i]) + 1; - } - } - - pr_info("CPU%d Features: %s\n", cpu, str); - - L1_cache_info[ICACHE].ways = CACHE_WAY(ICACHE); - L1_cache_info[ICACHE].line_size = CACHE_LINE_SIZE(ICACHE); - L1_cache_info[ICACHE].sets = CACHE_SET(ICACHE); - L1_cache_info[ICACHE].size = - L1_cache_info[ICACHE].ways * L1_cache_info[ICACHE].line_size * - L1_cache_info[ICACHE].sets / 1024; - pr_info("L1I:%dKB/%dS/%dW/%dB\n", L1_cache_info[ICACHE].size, - L1_cache_info[ICACHE].sets, L1_cache_info[ICACHE].ways, - L1_cache_info[ICACHE].line_size); - L1_cache_info[DCACHE].ways = CACHE_WAY(DCACHE); - L1_cache_info[DCACHE].line_size = CACHE_LINE_SIZE(DCACHE); - L1_cache_info[DCACHE].sets = CACHE_SET(DCACHE); - L1_cache_info[DCACHE].size = - L1_cache_info[DCACHE].ways * L1_cache_info[DCACHE].line_size * - L1_cache_info[DCACHE].sets / 1024; - pr_info("L1D:%dKB/%dS/%dW/%dB\n", L1_cache_info[DCACHE].size, - L1_cache_info[DCACHE].sets, L1_cache_info[DCACHE].ways, - L1_cache_info[DCACHE].line_size); - pr_info("L1 D-Cache is %s\n", WRITE_METHOD); - if (L1_cache_info[DCACHE].size != L1_CACHE_BYTES) - pr_crit - ("The cache line size(%d) of this processor is not the same as L1_CACHE_BYTES(%d).\n", - L1_cache_info[DCACHE].size, L1_CACHE_BYTES); -#ifdef CONFIG_CPU_CACHE_ALIASING - { - int aliasing_num; - aliasing_num = - L1_cache_info[ICACHE].size * 1024 / PAGE_SIZE / - L1_cache_info[ICACHE].ways; - L1_cache_info[ICACHE].aliasing_num = aliasing_num; - L1_cache_info[ICACHE].aliasing_mask = - (aliasing_num - 1) << PAGE_SHIFT; - aliasing_num = - L1_cache_info[DCACHE].size * 1024 / PAGE_SIZE / - L1_cache_info[DCACHE].ways; - L1_cache_info[DCACHE].aliasing_num = aliasing_num; - L1_cache_info[DCACHE].aliasing_mask = - (aliasing_num - 1) << PAGE_SHIFT; - } -#endif -#ifdef CONFIG_FPU - /* Disable fpu and enable when it is used. */ - if (has_fpu) - disable_fpu(); -#endif -} - -static void __init setup_cpuinfo(void) -{ - unsigned long tmp = 0, cpu_name; - - cpu_dcache_inval_all(); - cpu_icache_inval_all(); - __nds32__isb(); - - cpu_id = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskCPUID) >> CPU_VER_offCPUID; - cpu_name = ((cpu_id) & 0xf0) >> 4; - cpu_series = cpu_name ? cpu_name - 10 + 'A' : 'N'; - cpu_id = cpu_id & 0xf; - cpu_rev = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskREV) >> CPU_VER_offREV; - cpu_cfgid = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskCFGID) >> CPU_VER_offCFGID; - - pr_info("CPU:%c%ld, CPU_VER 0x%08x(id %lu, rev %lu, cfg %lu)\n", - cpu_series, cpu_id, __nds32__mfsr(NDS32_SR_CPU_VER), cpu_id, cpu_rev, cpu_cfgid); - - elf_hwcap |= HWCAP_MFUSR_PC; - - if (((__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskBASEV) >> MSC_CFG_offBASEV) == 0) { - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskDIV) - elf_hwcap |= HWCAP_DIV; - - if ((__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskMAC) - || (cpu_id == 12 && cpu_rev < 4)) - elf_hwcap |= HWCAP_MAC; - } else { - elf_hwcap |= HWCAP_V2; - elf_hwcap |= HWCAP_DIV; - elf_hwcap |= HWCAP_MAC; - } - - if (cpu_cfgid & 0x0001) - elf_hwcap |= HWCAP_EXT; - - if (cpu_cfgid & 0x0002) - elf_hwcap |= HWCAP_BASE16; - - if (cpu_cfgid & 0x0004) - elf_hwcap |= HWCAP_EXT2; - - if (cpu_cfgid & 0x0008) { - elf_hwcap |= HWCAP_FPU; - has_fpu = true; - } - if (cpu_cfgid & 0x0010) - elf_hwcap |= HWCAP_STRING; - - if (__nds32__mfsr(NDS32_SR_MMU_CFG) & MMU_CFG_mskDE) - endianness = "MSB"; - else - endianness = "LSB"; - - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskEDM) - elf_hwcap |= HWCAP_EDM; - - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskLMDMA) - elf_hwcap |= HWCAP_LMDMA; - - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskPFM) - elf_hwcap |= HWCAP_PFM; - - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskHSMP) - elf_hwcap |= HWCAP_HSMP; - - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskTRACE) - elf_hwcap |= HWCAP_TRACE; - - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskAUDIO) - elf_hwcap |= HWCAP_AUDIO; - - if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C) - elf_hwcap |= HWCAP_L2C; - -#ifdef CONFIG_HW_PRE - if (__nds32__mfsr(NDS32_SR_MISC_CTL) & MISC_CTL_makHWPRE_EN) - elf_hwcap |= HWCAP_HWPRE; -#endif - - tmp = __nds32__mfsr(NDS32_SR_CACHE_CTL); - if (!IS_ENABLED(CONFIG_CPU_DCACHE_DISABLE)) - tmp |= CACHE_CTL_mskDC_EN; - - if (!IS_ENABLED(CONFIG_CPU_ICACHE_DISABLE)) - tmp |= CACHE_CTL_mskIC_EN; - __nds32__mtsr_isb(tmp, NDS32_SR_CACHE_CTL); - - dump_cpu_info(smp_processor_id()); -} - -static void __init setup_memory(void) -{ - unsigned long ram_start_pfn; - unsigned long free_ram_start_pfn; - phys_addr_t memory_start, memory_end; - struct memblock_region *region; - - memory_end = memory_start = 0; - - /* Find main memory where is the kernel */ - for_each_memblock(memory, region) { - memory_start = region->base; - memory_end = region->base + region->size; - pr_info("%s: Memory: 0x%x-0x%x\n", __func__, - memory_start, memory_end); - } - - if (!memory_end) { - panic("No memory!"); - } - - ram_start_pfn = PFN_UP(memblock_start_of_DRAM()); - /* free_ram_start_pfn is first page after kernel */ - free_ram_start_pfn = PFN_UP(__pa(&_end)); - max_pfn = PFN_DOWN(memblock_end_of_DRAM()); - /* it could update max_pfn */ - if (max_pfn - ram_start_pfn <= MAXMEM_PFN) - max_low_pfn = max_pfn; - else { - max_low_pfn = MAXMEM_PFN + ram_start_pfn; - if (!IS_ENABLED(CONFIG_HIGHMEM)) - max_pfn = MAXMEM_PFN + ram_start_pfn; - } - /* high_memory is related with VMALLOC */ - high_memory = (void *)__va(max_low_pfn * PAGE_SIZE); - min_low_pfn = free_ram_start_pfn; - - /* - * initialize the boot-time allocator (with low memory only). - * - * This makes the memory from the end of the kernel to the end of - * RAM usable. - */ - memblock_set_bottom_up(true); - memblock_reserve(PFN_PHYS(ram_start_pfn), PFN_PHYS(free_ram_start_pfn - ram_start_pfn)); - - early_init_fdt_reserve_self(); - early_init_fdt_scan_reserved_mem(); - - memblock_dump_all(); -} - -void __init setup_arch(char **cmdline_p) -{ - early_init_devtree(__atags_pointer ? \ - phys_to_virt(__atags_pointer) : __dtb_start); - - setup_cpuinfo(); - - init_mm.start_code = (unsigned long)&_stext; - init_mm.end_code = (unsigned long)&_etext; - init_mm.end_data = (unsigned long)&_edata; - init_mm.brk = (unsigned long)&_end; - - /* setup bootmem allocator */ - setup_memory(); - - /* paging_init() sets up the MMU and marks all pages as reserved */ - paging_init(); - - /* invalidate all TLB entries because the new mapping is created */ - __nds32__tlbop_flua(); - - /* use generic way to parse */ - parse_early_param(); - - unflatten_and_copy_device_tree(); - - if(IS_ENABLED(CONFIG_VT)) { - if(IS_ENABLED(CONFIG_DUMMY_CONSOLE)) - conswitchp = &dummy_con; - } - - *cmdline_p = boot_command_line; - early_trap_init(); -} - -static int c_show(struct seq_file *m, void *v) -{ - int i; - - seq_printf(m, "Processor\t: %c%ld (id %lu, rev %lu, cfg %lu)\n", - cpu_series, cpu_id, cpu_id, cpu_rev, cpu_cfgid); - - seq_printf(m, "L1I\t\t: %luKB/%luS/%luW/%luB\n", - CACHE_SET(ICACHE) * CACHE_WAY(ICACHE) * - CACHE_LINE_SIZE(ICACHE) / 1024, CACHE_SET(ICACHE), - CACHE_WAY(ICACHE), CACHE_LINE_SIZE(ICACHE)); - - seq_printf(m, "L1D\t\t: %luKB/%luS/%luW/%luB\n", - CACHE_SET(DCACHE) * CACHE_WAY(DCACHE) * - CACHE_LINE_SIZE(DCACHE) / 1024, CACHE_SET(DCACHE), - CACHE_WAY(DCACHE), CACHE_LINE_SIZE(DCACHE)); - - seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", - loops_per_jiffy / (500000 / HZ), - (loops_per_jiffy / (5000 / HZ)) % 100); - - /* dump out the processor features */ - seq_puts(m, "Features\t: "); - - for (i = 0; hwcap_str[i]; i++) - if (elf_hwcap & (1 << i)) - seq_printf(m, "%s ", hwcap_str[i]); - - seq_puts(m, "\n\n"); - - return 0; -} - -static void *c_start(struct seq_file *m, loff_t * pos) -{ - return *pos < 1 ? (void *)1 : NULL; -} - -static void *c_next(struct seq_file *m, void *v, loff_t * pos) -{ - ++*pos; - return NULL; -} - -static void c_stop(struct seq_file *m, void *v) -{ -} - -struct seq_operations cpuinfo_op = { - .start = c_start, - .next = c_next, - .stop = c_stop, - .show = c_show -}; |