diff options
Diffstat (limited to 'arch/mips/cavium-octeon')
| -rw-r--r-- | arch/mips/cavium-octeon/executive/cvmx-bootmem.c | 5 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/setup.c | 312 |
2 files changed, 310 insertions, 7 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-bootmem.c b/arch/mips/cavium-octeon/executive/cvmx-bootmem.c index fdf5f19bfdb0..6d5ddbc112cc 100644 --- a/arch/mips/cavium-octeon/executive/cvmx-bootmem.c +++ b/arch/mips/cavium-octeon/executive/cvmx-bootmem.c @@ -688,3 +688,8 @@ int64_t cvmx_bootmem_phy_named_block_alloc(uint64_t size, uint64_t min_addr, cvmx_spinlock_unlock((cvmx_spinlock_t *)&(cvmx_bootmem_desc->lock)); return addr_allocated; } + +struct cvmx_bootmem_desc *cvmx_bootmem_get_desc(void) +{ + return cvmx_bootmem_desc; +} diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c index 67aa3b942f06..7c2b7aab77ba 100644 --- a/arch/mips/cavium-octeon/setup.c +++ b/arch/mips/cavium-octeon/setup.c @@ -25,6 +25,7 @@ #include <linux/serial_8250.h> #include <linux/of_fdt.h> #include <linux/libfdt.h> +#include <linux/kexec.h> #include <asm/processor.h> #include <asm/reboot.h> @@ -58,11 +59,208 @@ struct octeon_boot_descriptor *octeon_boot_desc_ptr; struct cvmx_bootinfo *octeon_bootinfo; EXPORT_SYMBOL(octeon_bootinfo); +static unsigned long long RESERVE_LOW_MEM = 0ull; +#ifdef CONFIG_KEXEC +#ifdef CONFIG_SMP +/* + * Wait for relocation code is prepared and send + * secondary CPUs to spin until kernel is relocated. + */ +static void octeon_kexec_smp_down(void *ignored) +{ + int cpu = smp_processor_id(); + + local_irq_disable(); + set_cpu_online(cpu, false); + while (!atomic_read(&kexec_ready_to_reboot)) + cpu_relax(); + + asm volatile ( + " sync \n" + " synci ($0) \n"); + + relocated_kexec_smp_wait(NULL); +} +#endif + +#define OCTEON_DDR0_BASE (0x0ULL) +#define OCTEON_DDR0_SIZE (0x010000000ULL) +#define OCTEON_DDR1_BASE (0x410000000ULL) +#define OCTEON_DDR1_SIZE (0x010000000ULL) +#define OCTEON_DDR2_BASE (0x020000000ULL) +#define OCTEON_DDR2_SIZE (0x3e0000000ULL) +#define OCTEON_MAX_PHY_MEM_SIZE (16*1024*1024*1024ULL) + +static struct kimage *kimage_ptr; + +static void kexec_bootmem_init(uint64_t mem_size, uint32_t low_reserved_bytes) +{ + int64_t addr; + struct cvmx_bootmem_desc *bootmem_desc; + + bootmem_desc = cvmx_bootmem_get_desc(); + + if (mem_size > OCTEON_MAX_PHY_MEM_SIZE) { + mem_size = OCTEON_MAX_PHY_MEM_SIZE; + pr_err("Error: requested memory too large," + "truncating to maximum size\n"); + } + + bootmem_desc->major_version = CVMX_BOOTMEM_DESC_MAJ_VER; + bootmem_desc->minor_version = CVMX_BOOTMEM_DESC_MIN_VER; + + addr = (OCTEON_DDR0_BASE + RESERVE_LOW_MEM + low_reserved_bytes); + bootmem_desc->head_addr = 0; + + if (mem_size <= OCTEON_DDR0_SIZE) { + __cvmx_bootmem_phy_free(addr, + mem_size - RESERVE_LOW_MEM - + low_reserved_bytes, 0); + return; + } + + __cvmx_bootmem_phy_free(addr, + OCTEON_DDR0_SIZE - RESERVE_LOW_MEM - + low_reserved_bytes, 0); + + mem_size -= OCTEON_DDR0_SIZE; + + if (mem_size > OCTEON_DDR1_SIZE) { + __cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, OCTEON_DDR1_SIZE, 0); + __cvmx_bootmem_phy_free(OCTEON_DDR2_BASE, + mem_size - OCTEON_DDR1_SIZE, 0); + } else + __cvmx_bootmem_phy_free(OCTEON_DDR1_BASE, mem_size, 0); +} + +static int octeon_kexec_prepare(struct kimage *image) +{ + int i; + char *bootloader = "kexec"; + + octeon_boot_desc_ptr->argc = 0; + for (i = 0; i < image->nr_segments; i++) { + if (!strncmp(bootloader, (char *)image->segment[i].buf, + strlen(bootloader))) { + /* + * convert command line string to array + * of parameters (as bootloader does). + */ + int argc = 0, offt; + char *str = (char *)image->segment[i].buf; + char *ptr = strchr(str, ' '); + while (ptr && (OCTEON_ARGV_MAX_ARGS > argc)) { + *ptr = '\0'; + if (ptr[1] != ' ') { + offt = (int)(ptr - str + 1); + octeon_boot_desc_ptr->argv[argc] = + image->segment[i].mem + offt; + argc++; + } + ptr = strchr(ptr + 1, ' '); + } + octeon_boot_desc_ptr->argc = argc; + break; + } + } + + /* + * Information about segments will be needed during pre-boot memory + * initialization. + */ + kimage_ptr = image; + return 0; +} + +static void octeon_generic_shutdown(void) +{ + int cpu, i; + struct cvmx_bootmem_desc *bootmem_desc; + void *named_block_array_ptr; + + bootmem_desc = cvmx_bootmem_get_desc(); + named_block_array_ptr = + cvmx_phys_to_ptr(bootmem_desc->named_block_array_addr); + +#ifdef CONFIG_SMP + /* disable watchdogs */ + for_each_online_cpu(cpu) + cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0); +#else + cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0); +#endif + if (kimage_ptr != kexec_crash_image) { + memset(named_block_array_ptr, + 0x0, + CVMX_BOOTMEM_NUM_NAMED_BLOCKS * + sizeof(struct cvmx_bootmem_named_block_desc)); + /* + * Mark all memory (except low 0x100000 bytes) as free. + * It is the same thing that bootloader does. + */ + kexec_bootmem_init(octeon_bootinfo->dram_size*1024ULL*1024ULL, + 0x100000); + /* + * Allocate all segments to avoid their corruption during boot. + */ + for (i = 0; i < kimage_ptr->nr_segments; i++) + cvmx_bootmem_alloc_address( + kimage_ptr->segment[i].memsz + 2*PAGE_SIZE, + kimage_ptr->segment[i].mem - PAGE_SIZE, + PAGE_SIZE); + } else { + /* + * Do not mark all memory as free. Free only named sections + * leaving the rest of memory unchanged. + */ + struct cvmx_bootmem_named_block_desc *ptr = + (struct cvmx_bootmem_named_block_desc *) + named_block_array_ptr; + + for (i = 0; i < bootmem_desc->named_block_num_blocks; i++) + if (ptr[i].size) + cvmx_bootmem_free_named(ptr[i].name); + } + kexec_args[2] = 1UL; /* running on octeon_main_processor */ + kexec_args[3] = (unsigned long)octeon_boot_desc_ptr; +#ifdef CONFIG_SMP + secondary_kexec_args[2] = 0UL; /* running on secondary cpu */ + secondary_kexec_args[3] = (unsigned long)octeon_boot_desc_ptr; +#endif +} + +static void octeon_shutdown(void) +{ + octeon_generic_shutdown(); +#ifdef CONFIG_SMP + smp_call_function(octeon_kexec_smp_down, NULL, 0); + smp_wmb(); + while (num_online_cpus() > 1) { + cpu_relax(); + mdelay(1); + } +#endif +} + +static void octeon_crash_shutdown(struct pt_regs *regs) +{ + octeon_generic_shutdown(); + default_machine_crash_shutdown(regs); +} + +#endif /* CONFIG_KEXEC */ + #ifdef CONFIG_CAVIUM_RESERVE32 uint64_t octeon_reserve32_memory; EXPORT_SYMBOL(octeon_reserve32_memory); #endif +#ifdef CONFIG_KEXEC +/* crashkernel cmdline parameter is parsed _after_ memory setup + * we also parse it here (workaround for EHB5200) */ +static uint64_t crashk_size, crashk_base; +#endif + static int octeon_uart; extern asmlinkage void handle_int(void); @@ -417,6 +615,8 @@ void octeon_user_io_init(void) void __init prom_init(void) { struct cvmx_sysinfo *sysinfo; + const char *arg; + char *p; int i; int argc; #ifdef CONFIG_CAVIUM_RESERVE32 @@ -568,6 +768,15 @@ void __init prom_init(void) if (octeon_is_simulation()) MAX_MEMORY = 64ull << 20; + arg = strstr(arcs_cmdline, "mem="); + if (arg) { + MAX_MEMORY = memparse(arg + 4, &p); + if (MAX_MEMORY == 0) + MAX_MEMORY = 32ull << 30; + if (*p == '@') + RESERVE_LOW_MEM = memparse(p + 1, &p); + } + arcs_cmdline[0] = 0; argc = octeon_boot_desc_ptr->argc; for (i = 0; i < argc; i++) { @@ -575,16 +784,30 @@ void __init prom_init(void) cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]); if ((strncmp(arg, "MEM=", 4) == 0) || (strncmp(arg, "mem=", 4) == 0)) { - sscanf(arg + 4, "%llu", &MAX_MEMORY); - MAX_MEMORY <<= 20; + MAX_MEMORY = memparse(arg + 4, &p); if (MAX_MEMORY == 0) MAX_MEMORY = 32ull << 30; + if (*p == '@') + RESERVE_LOW_MEM = memparse(p + 1, &p); } else if (strcmp(arg, "ecc_verbose") == 0) { #ifdef CONFIG_CAVIUM_REPORT_SINGLE_BIT_ECC __cvmx_interrupt_ecc_report_single_bit_errors = 1; pr_notice("Reporting of single bit ECC errors is " "turned on\n"); #endif +#ifdef CONFIG_KEXEC + } else if (strncmp(arg, "crashkernel=", 12) == 0) { + crashk_size = memparse(arg+12, &p); + if (*p == '@') + crashk_base = memparse(p+1, &p); + strcat(arcs_cmdline, " "); + strcat(arcs_cmdline, arg); + /* + * To do: switch parsing to new style, something like: + * parse_crashkernel(arg, sysinfo->system_dram_size, + * &crashk_size, &crashk_base); + */ +#endif } else if (strlen(arcs_cmdline) + strlen(arg) + 1 < sizeof(arcs_cmdline) - 1) { strcat(arcs_cmdline, " "); @@ -619,11 +842,18 @@ void __init prom_init(void) _machine_restart = octeon_restart; _machine_halt = octeon_halt; +#ifdef CONFIG_KEXEC + _machine_kexec_shutdown = octeon_shutdown; + _machine_crash_shutdown = octeon_crash_shutdown; + _machine_kexec_prepare = octeon_kexec_prepare; +#endif + octeon_user_io_init(); register_smp_ops(&octeon_smp_ops); } /* Exclude a single page from the regions obtained in plat_mem_setup. */ +#ifndef CONFIG_CRASH_DUMP static __init void memory_exclude_page(u64 addr, u64 *mem, u64 *size) { if (addr > *mem && addr < *mem + *size) { @@ -638,14 +868,21 @@ static __init void memory_exclude_page(u64 addr, u64 *mem, u64 *size) *size -= PAGE_SIZE; } } +#endif /* CONFIG_CRASH_DUMP */ void __init plat_mem_setup(void) { uint64_t mem_alloc_size; uint64_t total; + uint64_t crashk_end; +#ifndef CONFIG_CRASH_DUMP int64_t memory; + uint64_t kernel_start; + uint64_t kernel_size; +#endif total = 0; + crashk_end = 0; /* * The Mips memory init uses the first memory location for @@ -658,6 +895,17 @@ void __init plat_mem_setup(void) if (mem_alloc_size > MAX_MEMORY) mem_alloc_size = MAX_MEMORY; +/* Crashkernel ignores bootmem list. It relies on mem=X@Y option */ +#ifdef CONFIG_CRASH_DUMP + add_memory_region(RESERVE_LOW_MEM, MAX_MEMORY, BOOT_MEM_RAM); + total += MAX_MEMORY; +#else +#ifdef CONFIG_KEXEC + if (crashk_size > 0) { + add_memory_region(crashk_base, crashk_size, BOOT_MEM_RAM); + crashk_end = crashk_base + crashk_size; + } +#endif /* * When allocating memory, we want incrementing addresses from * bootmem_alloc so the code in add_memory_region can merge @@ -672,6 +920,9 @@ void __init plat_mem_setup(void) CVMX_BOOTMEM_FLAG_NO_LOCKING); if (memory >= 0) { u64 size = mem_alloc_size; +#ifdef CONFIG_KEXEC + uint64_t end; +#endif /* * exclude a page at the beginning and end of @@ -684,20 +935,67 @@ void __init plat_mem_setup(void) memory_exclude_page(CVMX_PCIE_BAR1_PHYS_BASE + CVMX_PCIE_BAR1_PHYS_SIZE, &memory, &size); +#ifdef CONFIG_KEXEC + end = memory + mem_alloc_size; /* - * This function automatically merges address - * regions next to each other if they are - * received in incrementing order. + * This function automatically merges address regions + * next to each other if they are received in + * incrementing order */ - if (size) - add_memory_region(memory, size, BOOT_MEM_RAM); + if (memory < crashk_base && end > crashk_end) { + /* region is fully in */ + add_memory_region(memory, + crashk_base - memory, + BOOT_MEM_RAM); + total += crashk_base - memory; + add_memory_region(crashk_end, + end - crashk_end, + BOOT_MEM_RAM); + total += end - crashk_end; + continue; + } + + if (memory >= crashk_base && end <= crashk_end) + /* + * Entire memory region is within the new + * kernel's memory, ignore it. + */ + continue; + + if (memory > crashk_base && memory < crashk_end && + end > crashk_end) { + /* + * Overlap with the beginning of the region, + * reserve the beginning. + */ + mem_alloc_size -= crashk_end - memory; + memory = crashk_end; + } else if (memory < crashk_base && end > crashk_base && + end < crashk_end) + /* + * Overlap with the beginning of the region, + * chop of end. + */ + mem_alloc_size -= end - crashk_base; +#endif + add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM); total += mem_alloc_size; + /* Recovering mem_alloc_size */ + mem_alloc_size = 4 << 20; } else { break; } } cvmx_bootmem_unlock(); + /* Add the memory region for the kernel. */ + kernel_start = (unsigned long) _text; + kernel_size = ALIGN(_end - _text, 0x100000); + + /* Adjust for physical offset. */ + kernel_start &= ~0xffffffff80000000ULL; + add_memory_region(kernel_start, kernel_size, BOOT_MEM_RAM); +#endif /* CONFIG_CRASH_DUMP */ #ifdef CONFIG_CAVIUM_RESERVE32 /* |