On Fri, 21 Mar 2014 18:44:02 +0800
Huacai Chen <chenhc@xxxxxxxxxx> wrote:
> The new UEFI-like firmware interface (LEFI, i.e. Loongson Unified
> Firmware Interface) has 3 advantages:
>
> 1, Firmware export a physical memory map which is similar to X86's
> E820 map, so prom_init_memory() will be more elegant that #ifdef
> clauses can be removed.
> 2, Firmware export a pci irq routing table, we no longer need pci
> irq routing fixup in kernel's code.
> 3, Firmware has a built-in vga bios, and its address is exported,
> the linux kernel no longer need an embedded blob.
>
> With the LEFI interface, Loongson-3A/2G and all their successors can use
> a unified kernel. All Loongson-based machines support this new interface
> except 2E/2F series.
Do you really need to reinvent the wheel?
Why you can't just use existing Open Firmware Device Tree?
> Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
> Signed-off-by: Hongliang Tao <taohl@xxxxxxxxxx>
> Signed-off-by: Hua Yan <yanh@xxxxxxxxxx>
> Tested-by: Alex Smith <alex.smith@xxxxxxxxxx>
> Reviewed-by: Alex Smith <alex.smith@xxxxxxxxxx>
> ---
> arch/mips/include/asm/mach-loongson/boot_param.h | 163 ++++++++++++++++++++++
> arch/mips/include/asm/mach-loongson/loongson.h | 4 +-
> arch/mips/loongson/common/env.c | 67 +++++++--
> arch/mips/loongson/common/init.c | 9 +-
> arch/mips/loongson/common/mem.c | 42 ++++++
> arch/mips/loongson/common/pci.c | 6 +-
> arch/mips/loongson/common/reset.c | 21 +++
> 7 files changed, 292 insertions(+), 20 deletions(-)
> create mode 100644 arch/mips/include/asm/mach-loongson/boot_param.h
>
> diff --git a/arch/mips/include/asm/mach-loongson/boot_param.h b/arch/mips/include/asm/mach-loongson/boot_param.h
> new file mode 100644
> index 0000000..829a7ec
> --- /dev/null
> +++ b/arch/mips/include/asm/mach-loongson/boot_param.h
> @@ -0,0 +1,163 @@
> +#ifndef __ASM_MACH_LOONGSON_BOOT_PARAM_H_
> +#define __ASM_MACH_LOONGSON_BOOT_PARAM_H_
> +
> +#define SYSTEM_RAM_LOW 1
> +#define SYSTEM_RAM_HIGH 2
> +#define MEM_RESERVED 3
> +#define PCI_IO 4
> +#define PCI_MEM 5
> +#define LOONGSON_CFG_REG 6
> +#define VIDEO_ROM 7
> +#define ADAPTER_ROM 8
> +#define ACPI_TABLE 9
> +#define MAX_MEMORY_TYPE 10
> +
> +#define LOONGSON3_BOOT_MEM_MAP_MAX 128
> +struct efi_memory_map_loongson {
> + u16 vers; /* version of efi_memory_map */
> + u32 nr_map; /* number of memory_maps */
> + u32 mem_freq; /* memory frequence */
> + struct mem_map {
> + u32 node_id; /* node_id which memory attached to */
> + u32 mem_type; /* system memory, pci memory, pci io, etc. */
> + u64 mem_start; /* memory map start address */
> + u32 mem_size; /* each memory_map size, not the total size */
> + } map[LOONGSON3_BOOT_MEM_MAP_MAX];
> +} __packed;
> +
> +enum loongson_cpu_type {
> + Loongson_2E = 0,
> + Loongson_2F = 1,
> + Loongson_3A = 2,
> + Loongson_3B = 3,
> + Loongson_1A = 4,
> + Loongson_1B = 5
> +};
> +
> +/*
> + * Capability and feature descriptor structure for MIPS CPU
> + */
> +struct efi_cpuinfo_loongson {
> + u16 vers; /* version of efi_cpuinfo_loongson */
> + u32 processor_id; /* PRID, e.g. 6305, 6306 */
> + u32 cputype; /* Loongson_3A/3B, etc. */
> + u32 total_node; /* num of total numa nodes */
> + u32 cpu_startup_core_id; /* Core id */
> + u32 cpu_clock_freq; /* cpu_clock */
> + u32 nr_cpus;
> +} __packed;
> +
> +struct system_loongson {
> + u16 vers; /* version of system_loongson */
> + u32 ccnuma_smp; /* 0: no numa; 1: has numa */
> + u32 sing_double_channel; /* 1:single; 2:double */
> +} __packed;
> +
> +struct irq_source_routing_table {
> + u16 vers;
> + u16 size;
> + u16 rtr_bus;
> + u16 rtr_devfn;
> + u32 vendor;
> + u32 device;
> + u32 PIC_type; /* conform use HT or PCI to route to CPU-PIC */
> + u64 ht_int_bit; /* 3A: 1<<24; 3B: 1<<16 */
> + u64 ht_enable; /* irqs used in this PIC */
> + u32 node_id; /* node id: 0x0-0; 0x1-1; 0x10-2; 0x11-3 */
> + u64 pci_mem_start_addr;
> + u64 pci_mem_end_addr;
> + u64 pci_io_start_addr;
> + u64 pci_io_end_addr;
> + u64 pci_config_addr;
> + u32 dma_mask_bits;
> +} __packed;
> +
> +struct interface_info {
> + u16 vers; /* version of the specificition */
> + u16 size;
> + u8 flag;
> + char description[64];
> +} __packed;
> +
> +#define MAX_RESOURCE_NUMBER 128
> +struct resource_loongson {
> + u64 start; /* resource start address */
> + u64 end; /* resource end address */
> + char name[64];
> + u32 flags;
> +};
> +
> +struct archdev_data {}; /* arch specific additions */
> +
> +struct board_devices {
> + char name[64]; /* hold the device name */
> + u32 num_resources; /* number of device_resource */
> + /* for each device's resource */
> + struct resource_loongson resource[MAX_RESOURCE_NUMBER];
> + /* arch specific additions */
> + struct archdev_data archdata;
> +};
> +
> +struct loongson_special_attribute {
> + u16 vers; /* version of this special */
> + char special_name[64]; /* special_atribute_name */
> + u32 loongson_special_type; /* type of special device */
> + /* for each device's resource */
> + struct resource_loongson resource[MAX_RESOURCE_NUMBER];
> +};
> +
> +struct loongson_params {
> + u64 memory_offset; /* efi_memory_map_loongson struct offset */
> + u64 cpu_offset; /* efi_cpuinfo_loongson struct offset */
> + u64 system_offset; /* system_loongson struct offset */
> + u64 irq_offset; /* irq_source_routing_table struct offset */
> + u64 interface_offset; /* interface_info struct offset */
> + u64 special_offset; /* loongson_special_attribute struct offset */
> + u64 boarddev_table_offset; /* board_devices offset */
> +};
> +
> +struct smbios_tables {
> + u16 vers; /* version of smbios */
> + u64 vga_bios; /* vga_bios address */
> + struct loongson_params lp;
> +};
> +
> +struct efi_reset_system_t {
> + u64 ResetCold;
> + u64 ResetWarm;
> + u64 ResetType;
> + u64 Shutdown;
> + u64 DoSuspend; /* NULL if not support */
> +};
> +
> +struct efi_loongson {
> + u64 mps; /* MPS table */
> + u64 acpi; /* ACPI table (IA64 ext 0.71) */
> + u64 acpi20; /* ACPI table (ACPI 2.0) */
> + struct smbios_tables smbios; /* SM BIOS table */
> + u64 sal_systab; /* SAL system table */
> + u64 boot_info; /* boot info table */
> +};
> +
> +struct boot_params {
> + struct efi_loongson efi;
> + struct efi_reset_system_t reset_system;
> +};
> +
> +struct loongson_system_configuration {
> + u32 nr_cpus;
> + enum loongson_cpu_type cputype;
> + u64 ht_control_base;
> + u64 pci_mem_start_addr;
> + u64 pci_mem_end_addr;
> + u64 pci_io_base;
> + u64 restart_addr;
> + u64 poweroff_addr;
> + u64 suspend_addr;
> + u64 vgabios_addr;
> + u32 dma_mask_bits;
> +};
> +
> +extern struct efi_memory_map_loongson *loongson_memmap;
> +extern struct loongson_system_configuration loongson_sysconf;
> +#endif
> diff --git a/arch/mips/include/asm/mach-loongson/loongson.h b/arch/mips/include/asm/mach-loongson/loongson.h
> index b286534..5913ea0 100644
> --- a/arch/mips/include/asm/mach-loongson/loongson.h
> +++ b/arch/mips/include/asm/mach-loongson/loongson.h
> @@ -24,8 +24,8 @@ extern void mach_prepare_reboot(void);
> extern void mach_prepare_shutdown(void);
>
> /* environment arguments from bootloader */
> -extern unsigned long cpu_clock_freq;
> -extern unsigned long memsize, highmemsize;
> +extern u32 cpu_clock_freq;
> +extern u32 memsize, highmemsize;
>
> /* loongson-specific command line, env and memory initialization */
> extern void __init prom_init_memory(void);
> diff --git a/arch/mips/loongson/common/env.c b/arch/mips/loongson/common/env.c
> index 0a18fcf..0c543ea 100644
> --- a/arch/mips/loongson/common/env.c
> +++ b/arch/mips/loongson/common/env.c
> @@ -18,29 +18,30 @@
> * option) any later version.
> */
> #include <linux/module.h>
> -
> #include <asm/bootinfo.h>
> -
> #include <loongson.h>
> +#include <boot_param.h>
>
> -unsigned long cpu_clock_freq;
> +u32 cpu_clock_freq;
> EXPORT_SYMBOL(cpu_clock_freq);
> -unsigned long memsize, highmemsize;
> +struct efi_memory_map_loongson *loongson_memmap;
> +struct loongson_system_configuration loongson_sysconf;
>
> #define parse_even_earlier(res, option, p) \
> do { \
> unsigned int tmp __maybe_unused; \
> \
> if (strncmp(option, (char *)p, strlen(option)) == 0) \
> - tmp = strict_strtol((char *)p + strlen(option"="), 10, &res); \
> + tmp = kstrtou32((char *)p + strlen(option"="), 10, &res); \
> } while (0)
>
> void __init prom_init_env(void)
> {
> /* pmon passes arguments in 32bit pointers */
> - int *_prom_envp;
> - unsigned long bus_clock;
> unsigned int processor_id;
> +
> +#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
> + int *_prom_envp;
> long l;
>
> /* firmware arguments are initialized in head.S */
> @@ -48,7 +49,6 @@ void __init prom_init_env(void)
>
> l = (long)*_prom_envp;
> while (l != 0) {
> - parse_even_earlier(bus_clock, "busclock", l);
> parse_even_earlier(cpu_clock_freq, "cpuclock", l);
> parse_even_earlier(memsize, "memsize", l);
> parse_even_earlier(highmemsize, "highmemsize", l);
> @@ -57,8 +57,48 @@ void __init prom_init_env(void)
> }
> if (memsize == 0)
> memsize = 256;
> - if (bus_clock == 0)
> - bus_clock = 66000000;
> + pr_info("memsize=%u, highmemsize=%u\n", memsize, highmemsize);
> +#else
> + struct boot_params *boot_p;
> + struct loongson_params *loongson_p;
> + struct efi_cpuinfo_loongson *ecpu;
> + struct irq_source_routing_table *eirq_source;
> +
> + /* firmware arguments are initialized in head.S */
> + boot_p = (struct boot_params *)fw_arg2;
> + loongson_p = &(boot_p->efi.smbios.lp);
> +
> + ecpu = (struct efi_cpuinfo_loongson *)
> + ((u64)loongson_p + loongson_p->cpu_offset);
> + eirq_source = (struct irq_source_routing_table *)
> + ((u64)loongson_p + loongson_p->irq_offset);
> + loongson_memmap = (struct efi_memory_map_loongson *)
> + ((u64)loongson_p + loongson_p->memory_offset);
> +
> + cpu_clock_freq = ecpu->cpu_clock_freq;
> + loongson_sysconf.cputype = ecpu->cputype;
> + loongson_sysconf.nr_cpus = ecpu->nr_cpus;
> + if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0)
> + loongson_sysconf.nr_cpus = NR_CPUS;
> +
> + loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
> + loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;
> + loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr;
> + loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits;
> + if (loongson_sysconf.dma_mask_bits < 32 ||
> + loongson_sysconf.dma_mask_bits > 64)
> + loongson_sysconf.dma_mask_bits = 32;
> +
> + loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm;
> + loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;
> + loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend;
> +
> + loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
> + loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios;
> + pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n",
> + loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr,
> + loongson_sysconf.vgabios_addr);
> +#endif
> if (cpu_clock_freq == 0) {
> processor_id = (¤t_cpu_data)->processor_id;
> switch (processor_id & PRID_REV_MASK) {
> @@ -68,12 +108,13 @@ void __init prom_init_env(void)
> case PRID_REV_LOONGSON2F:
> cpu_clock_freq = 797000000;
> break;
> + case PRID_REV_LOONGSON3A:
> + cpu_clock_freq = 900000000;
> + break;
> default:
> cpu_clock_freq = 100000000;
> break;
> }
> }
> -
> - pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
> - bus_clock, cpu_clock_freq, memsize, highmemsize);
> + pr_info("CpuClock = %u\n", cpu_clock_freq);
> }
> diff --git a/arch/mips/loongson/common/init.c b/arch/mips/loongson/common/init.c
> index ae7af1f..81ba3b4 100644
> --- a/arch/mips/loongson/common/init.c
> +++ b/arch/mips/loongson/common/init.c
> @@ -17,10 +17,6 @@ unsigned long __maybe_unused _loongson_addrwincfg_base;
>
> void __init prom_init(void)
> {
> - /* init base address of io space */
> - set_io_port_base((unsigned long)
> - ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
> -
> #ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
> _loongson_addrwincfg_base = (unsigned long)
> ioremap(LOONGSON_ADDRWINCFG_BASE, LOONGSON_ADDRWINCFG_SIZE);
> @@ -28,6 +24,11 @@ void __init prom_init(void)
>
> prom_init_cmdline();
> prom_init_env();
> +
> + /* init base address of io space */
> + set_io_port_base((unsigned long)
> + ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
> +
> prom_init_memory();
>
> /*init the uart base address */
> diff --git a/arch/mips/loongson/common/mem.c b/arch/mips/loongson/common/mem.c
> index 8626a42..b01d524 100644
> --- a/arch/mips/loongson/common/mem.c
> +++ b/arch/mips/loongson/common/mem.c
> @@ -11,9 +11,14 @@
> #include <asm/bootinfo.h>
>
> #include <loongson.h>
> +#include <boot_param.h>
> #include <mem.h>
> #include <pci.h>
>
> +#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
> +
> +u32 memsize, highmemsize;
> +
> void __init prom_init_memory(void)
> {
> add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
> @@ -49,6 +54,43 @@ void __init prom_init_memory(void)
> #endif /* !CONFIG_64BIT */
> }
>
> +#else /* CONFIG_LEFI_FIRMWARE_INTERFACE */
> +
> +void __init prom_init_memory(void)
> +{
> + int i;
> + u32 node_id;
> + u32 mem_type;
> +
> + /* parse memory information */
> + for (i = 0; i < loongson_memmap->nr_map; i++) {
> + node_id = loongson_memmap->map[i].node_id;
> + mem_type = loongson_memmap->map[i].mem_type;
> +
> + if (node_id == 0) {
> + switch (mem_type) {
> + case SYSTEM_RAM_LOW:
> + add_memory_region(loongson_memmap->map[i].mem_start,
> + (u64)loongson_memmap->map[i].mem_size << 20,
> + BOOT_MEM_RAM);
> + break;
> + case SYSTEM_RAM_HIGH:
> + add_memory_region(loongson_memmap->map[i].mem_start,
> + (u64)loongson_memmap->map[i].mem_size << 20,
> + BOOT_MEM_RAM);
> + break;
> + case MEM_RESERVED:
> + add_memory_region(loongson_memmap->map[i].mem_start,
> + (u64)loongson_memmap->map[i].mem_size << 20,
> + BOOT_MEM_RESERVED);
> + break;
> + }
> + }
> + }
> +}
> +
> +#endif /* CONFIG_LEFI_FIRMWARE_INTERFACE */
> +
> /* override of arch/mips/mm/cache.c: __uncached_access */
> int __uncached_access(struct file *file, unsigned long addr)
> {
> diff --git a/arch/mips/loongson/common/pci.c b/arch/mips/loongson/common/pci.c
> index fa77844..003ab4e 100644
> --- a/arch/mips/loongson/common/pci.c
> +++ b/arch/mips/loongson/common/pci.c
> @@ -11,6 +11,7 @@
>
> #include <pci.h>
> #include <loongson.h>
> +#include <boot_param.h>
>
> static struct resource loongson_pci_mem_resource = {
> .name = "pci memory space",
> @@ -82,7 +83,10 @@ static int __init pcibios_init(void)
> setup_pcimap();
>
> loongson_pci_controller.io_map_base = mips_io_port_base;
> -
> +#ifdef CONFIG_LEFI_FIRMWARE_INTERFACE
> + loongson_pci_mem_resource.start = loongson_sysconf.pci_mem_start_addr;
> + loongson_pci_mem_resource.end = loongson_sysconf.pci_mem_end_addr;
> +#endif
> register_pci_controller(&loongson_pci_controller);
>
> return 0;
> diff --git a/arch/mips/loongson/common/reset.c b/arch/mips/loongson/common/reset.c
> index 65bfbb5..a60715e 100644
> --- a/arch/mips/loongson/common/reset.c
> +++ b/arch/mips/loongson/common/reset.c
> @@ -16,6 +16,7 @@
> #include <asm/reboot.h>
>
> #include <loongson.h>
> +#include <boot_param.h>
>
> static inline void loongson_reboot(void)
> {
> @@ -37,17 +38,37 @@ static inline void loongson_reboot(void)
>
> static void loongson_restart(char *command)
> {
> +#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
> /* do preparation for reboot */
> mach_prepare_reboot();
>
> /* reboot via jumping to boot base address */
> loongson_reboot();
> +#else
> + void (*fw_restart)(void) = (void *)loongson_sysconf.restart_addr;
> +
> + fw_restart();
> + while (1) {
> + if (cpu_wait)
> + cpu_wait();
> + }
> +#endif
> }
>
> static void loongson_poweroff(void)
> {
> +#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
> mach_prepare_shutdown();
> unreachable();
> +#else
> + void (*fw_poweroff)(void) = (void *)loongson_sysconf.poweroff_addr;
> +
> + fw_poweroff();
> + while (1) {
> + if (cpu_wait)
> + cpu_wait();
> + }
> +#endif
> }
>
> static void loongson_halt(void)
> --
> 1.7.7.3
>
>
--
--
Best regards,
Antony Pavlov
