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u-boot/arch/mips/mach-octeon/bootoctlinux.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 Stefan Roese <sr@denx.de>
*/
#include <command.h>
#include <config.h>
#include <cpu_func.h>
#include <dm.h>
#include <elf.h>
#include <env.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <linux/compat.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <mach/cvmx-coremask.h>
#include <mach/cvmx-bootinfo.h>
#include <mach/cvmx-bootmem.h>
#include <mach/cvmx-regs.h>
#include <mach/cvmx-fuse.h>
#include <mach/octeon-model.h>
#include <mach/octeon-feature.h>
#include <mach/bootoct_cmd.h>
#include <mach/cvmx-ciu-defs.h>
DECLARE_GLOBAL_DATA_PTR;
/* ToDo: Revisit these settings */
#define OCTEON_RESERVED_LOW_MEM_SIZE (512 * 1024)
#define OCTEON_RESERVED_LOW_BOOT_MEM_SIZE (1024 * 1024)
#define BOOTLOADER_BOOTMEM_DESC_SPACE (1024 * 1024)
/* Default stack and heap sizes, in bytes */
#define DEFAULT_STACK_SIZE (1 * 1024 * 1024)
#define DEFAULT_HEAP_SIZE (3 * 1024 * 1024)
/**
* NOTE: This must duplicate octeon_boot_descriptor_t in the toolchain
* octeon-app-init.h file.
*/
enum {
/* If set, core should do app-wide init, only one core per app will have
* this flag set.
*/
BOOT_FLAG_INIT_CORE = 1,
OCTEON_BL_FLAG_DEBUG = 1 << 1,
OCTEON_BL_FLAG_NO_MAGIC = 1 << 2,
/* If set, use uart1 for console */
OCTEON_BL_FLAG_CONSOLE_UART1 = 1 << 3,
OCTEON_BL_FLAG_CONSOLE_PCI = 1 << 4, /* If set, use PCI console */
/* Call exit on break on serial port */
OCTEON_BL_FLAG_BREAK = 1 << 5,
/*
* Be sure to update OCTEON_APP_INIT_H_VERSION when new fields are added
* and to conditionalize the new flag's usage based on the version.
*/
} octeon_boot_descriptor_flag;
/**
* NOTE: This must duplicate octeon_boot_descriptor_t in the toolchain
* octeon-app-init.h file.
*/
#ifndef OCTEON_CURRENT_DESC_VERSION
# define OCTEON_CURRENT_DESC_VERSION 7
#endif
/**
* NOTE: This must duplicate octeon_boot_descriptor_t in the toolchain
* octeon-app-init.h file.
*/
/* Version 7 changes: Change names of deprecated fields */
#ifndef OCTEON_ARGV_MAX_ARGS
# define OCTEON_ARGV_MAX_ARGS 64
#endif
/**
* NOTE: This must duplicate octeon_boot_descriptor_t in the toolchain
* octeon-app-init.h file.
*/
#ifndef OCTEON_SERIAL_LEN
# define OCTEON_SERIAL_LEN 20
#endif
/**
* Bootloader structure used to pass info to Octeon executive startup code.
* NOTE: all fields are deprecated except for:
* * desc_version
* * desc_size,
* * heap_base
* * heap_end
* * eclock_hz
* * flags
* * argc
* * argv
* * cvmx_desc_vaddr
* * debugger_flags_base_addr
*
* All other fields have been moved to the cvmx_descriptor, and the new
* fields should be added there. They are left as placeholders in this
* structure for binary compatibility.
*
* NOTE: This structure must match what is in the toolchain octeon-app-init.h
* file.
*/
struct octeon_boot_descriptor {
/* Start of block referenced by assembly code - do not change! */
u32 desc_version;
u32 desc_size;
u64 stack_top;
u64 heap_base;
u64 heap_end;
u64 deprecated17;
u64 deprecated16;
/* End of block referenced by assembly code - do not change! */
u32 deprecated18;
u32 deprecated15;
u32 deprecated14;
u32 argc; /* argc for main() */
u32 argv[OCTEON_ARGV_MAX_ARGS]; /* argv for main() */
u32 flags; /* Flags for application */
u32 core_mask; /* Coremask running this image */
u32 dram_size; /* DEPRECATED, DRAM size in megabyes. Used up to SDK 1.8.1 */
u32 phy_mem_desc_addr;
u32 debugger_flags_base_addr; /* used to pass flags from app to debugger. */
u32 eclock_hz; /* CPU clock speed, in hz. */
u32 deprecated10;
u32 deprecated9;
u16 deprecated8;
u8 deprecated7;
u8 deprecated6;
u16 deprecated5;
u8 deprecated4;
u8 deprecated3;
char deprecated2[OCTEON_SERIAL_LEN];
u8 deprecated1[6];
u8 deprecated0;
u64 cvmx_desc_vaddr; /* Address of cvmx descriptor */
};
static struct octeon_boot_descriptor boot_desc[CVMX_MIPS_MAX_CORES];
static struct cvmx_bootinfo cvmx_bootinfo_array[CVMX_MIPS_MAX_CORES];
/**
* Programs the boot bus moveable region
* @param base base address to place the boot bus moveable region
* (bits [31:7])
* @param region_num Selects which region, 0 or 1 for node 0,
* 2 or 3 for node 1
* @param enable Set true to enable, false to disable
* @param data Pointer to data to put in the region, up to
* 16 dwords.
* @param num_words Number of data dwords (up to 32)
*
* Return: 0 for success, -1 on error
*/
static int octeon_set_moveable_region(u32 base, int region_num,
bool enable, const u64 *data,
unsigned int num_words)
{
int node = region_num >> 1;
u64 val;
int i;
u8 node_mask = 0x01; /* ToDo: Currently only one node is supported */
debug("%s(0x%x, %d, %d, %p, %u)\n", __func__, base, region_num, enable,
data, num_words);
if (num_words > 32) {
printf("%s: Too many words (%d) for region %d\n", __func__,
num_words, region_num);
return -1;
}
if (base & 0x7f) {
printf("%s: Error: base address 0x%x must be 128 byte aligned\n",
__func__, base);
return -1;
}
if (region_num > (node_mask > 1 ? 3 : 1)) {
printf("%s: Region number %d out of range\n",
__func__, region_num);
return -1;
}
if (!data && num_words > 0) {
printf("%s: Error: NULL data\n", __func__);
return -1;
}
region_num &= 1;
val = MIO_BOOT_LOC_CFG_EN |
FIELD_PREP(MIO_BOOT_LOC_CFG_BASE, base >> 7);
debug("%s: Setting MIO_BOOT_LOC_CFG(%d) on node %d to 0x%llx\n",
__func__, region_num, node, val);
csr_wr(CVMX_MIO_BOOT_LOC_CFGX(region_num & 1), val);
val = FIELD_PREP(MIO_BOOT_LOC_ADR_ADR, (region_num ? 0x80 : 0x00) >> 3);
debug("%s: Setting MIO_BOOT_LOC_ADR start to 0x%llx\n", __func__, val);
csr_wr(CVMX_MIO_BOOT_LOC_ADR, val);
for (i = 0; i < num_words; i++) {
debug(" 0x%02llx: 0x%016llx\n",
csr_rd(CVMX_MIO_BOOT_LOC_ADR), data[i]);
csr_wr(CVMX_MIO_BOOT_LOC_DAT, data[i]);
}
return 0;
}
/**
* Parse comma separated numbers into an array
*
* @param[out] values values read for each node
* @param[in] str string to parse
* @param base 0 for auto, otherwise 8, 10 or 16 for the number base
*
* Return: number of values read.
*/
static int octeon_parse_nodes(u64 values[CVMX_MAX_NODES],
const char *str, int base)
{
int node = 0;
char *sep;
do {
debug("Parsing node %d: \"%s\"\n", node, str);
values[node] = simple_strtoull(str, &sep, base);
debug(" node %d: 0x%llx\n", node, values[node]);
str = sep + 1;
} while (++node < CVMX_MAX_NODES && *sep == ',');
debug("%s: returning %d\n", __func__, node);
return node;
}
/**
* Parse command line arguments
*
* @param argc number of arguments
* @param[in] argv array of argument strings
* @param cmd command type
* @param[out] boot_args parsed values
*
* Return: number of arguments parsed
*/
int octeon_parse_bootopts(int argc, char *const argv[],
enum octeon_boot_cmd_type cmd,
struct octeon_boot_args *boot_args)
{
u64 node_values[CVMX_MAX_NODES];
int arg, j;
int num_values;
int node;
u8 node_mask = 0x01; /* ToDo: Currently only one node is supported */
debug("%s(%d, %p, %d, %p)\n", __func__, argc, argv, cmd, boot_args);
memset(boot_args, 0, sizeof(*boot_args));
boot_args->stack_size = DEFAULT_STACK_SIZE;
boot_args->heap_size = DEFAULT_HEAP_SIZE;
boot_args->node_mask = 0;
for (arg = 0; arg < argc; arg++) {
debug(" argv[%d]: %s\n", arg, argv[arg]);
if (cmd == BOOTOCT && !strncmp(argv[arg], "stack=", 6)) {
boot_args->stack_size = simple_strtoul(argv[arg] + 6,
NULL, 0);
} else if (cmd == BOOTOCT && !strncmp(argv[arg], "heap=", 5)) {
boot_args->heap_size = simple_strtoul(argv[arg] + 5,
NULL, 0);
} else if (!strncmp(argv[arg], "debug", 5)) {
puts("setting debug flag!\n");
boot_args->boot_flags |= OCTEON_BL_FLAG_DEBUG;
} else if (cmd == BOOTOCT && !strncmp(argv[arg], "break", 5)) {
puts("setting break flag!\n");
boot_args->boot_flags |= OCTEON_BL_FLAG_BREAK;
} else if (!strncmp(argv[arg], "forceboot", 9)) {
boot_args->forceboot = true;
} else if (!strncmp(argv[arg], "nodemask=", 9)) {
boot_args->node_mask = hextoul(argv[arg] + 9, NULL);
} else if (!strncmp(argv[arg], "numcores=", 9)) {
memset(node_values, 0, sizeof(node_values));
num_values = octeon_parse_nodes(node_values,
argv[arg] + 9, 0);
for (j = 0; j < num_values; j++)
boot_args->num_cores[j] = node_values[j];
boot_args->num_cores_set = true;
} else if (!strncmp(argv[arg], "skipcores=", 10)) {
memset(node_values, 0, sizeof(node_values));
num_values = octeon_parse_nodes(node_values,
argv[arg] + 10, 0);
for (j = 0; j < num_values; j++)
boot_args->num_skipped[j] = node_values[j];
boot_args->num_skipped_set = true;
} else if (!strncmp(argv[arg], "console_uart=", 13)) {
boot_args->console_uart = simple_strtoul(argv[arg] + 13,
NULL, 0);
if (boot_args->console_uart == 1) {
boot_args->boot_flags |=
OCTEON_BL_FLAG_CONSOLE_UART1;
} else if (!boot_args->console_uart) {
boot_args->boot_flags &=
~OCTEON_BL_FLAG_CONSOLE_UART1;
}
} else if (!strncmp(argv[arg], "coremask=", 9)) {
memset(node_values, 0, sizeof(node_values));
num_values = octeon_parse_nodes(node_values,
argv[arg] + 9, 16);
for (j = 0; j < num_values; j++)
cvmx_coremask_set64_node(&boot_args->coremask,
j, node_values[j]);
boot_args->coremask_set = true;
} else if (cmd == BOOTOCTLINUX &&
!strncmp(argv[arg], "namedblock=", 11)) {
boot_args->named_block = argv[arg] + 11;
} else if (!strncmp(argv[arg], "endbootargs", 11)) {
boot_args->endbootargs = 1;
arg++;
if (argc >= arg && cmd != BOOTOCTLINUX)
boot_args->app_name = argv[arg];
break;
} else {
debug(" Unknown argument \"%s\"\n", argv[arg]);
}
}
if (boot_args->coremask_set && boot_args->num_cores_set) {
puts("Warning: both coremask and numcores are set, using coremask.\n");
} else if (!boot_args->coremask_set && !boot_args->num_cores_set) {
cvmx_coremask_set_core(&boot_args->coremask, 0);
boot_args->coremask_set = true;
} else if ((!boot_args->coremask_set) && boot_args->num_cores_set) {
cvmx_coremask_for_each_node(node, node_mask)
cvmx_coremask_set64_node(&boot_args->coremask, node,
((1ull << boot_args->num_cores[node]) - 1) <<
boot_args->num_skipped[node]);
boot_args->coremask_set = true;
}
/* Update the node mask based on the coremask or the number of cores */
for (j = 0; j < CVMX_MAX_NODES; j++) {
if (cvmx_coremask_get64_node(&boot_args->coremask, j))
boot_args->node_mask |= 1 << j;
}
debug("%s: return %d\n", __func__, arg);
return arg;
}
int do_bootoctlinux(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
kernel_entry_t kernel;
struct octeon_boot_args boot_args;
int arg_start = 1;
int arg_count;
u64 addr = 0; /* Address of the ELF image */
int arg0;
u64 arg1;
u64 arg2;
u64 arg3;
int ret;
struct cvmx_coremask core_mask;
struct cvmx_coremask coremask_to_run;
struct cvmx_coremask avail_coremask;
int first_core;
int core;
const u64 *nmi_code;
int num_dwords;
u8 node_mask = 0x01;
int i;
cvmx_coremask_clear_all(&core_mask);
cvmx_coremask_clear_all(&coremask_to_run);
if (argc >= 2 && (isxdigit(argv[1][0]) && (isxdigit(argv[1][1]) ||
argv[1][1] == 'x' ||
argv[1][1] == 'X' ||
argv[1][1] == '\0'))) {
addr = hextoul(argv[1], NULL);
if (!addr)
addr = CONFIG_SYS_LOAD_ADDR;
arg_start++;
}
if (addr == 0)
addr = CONFIG_SYS_LOAD_ADDR;
debug("%s: arg start: %d\n", __func__, arg_start);
arg_count = octeon_parse_bootopts(argc - arg_start, argv + arg_start,
BOOTOCTLINUX, &boot_args);
debug("%s:\n"
" named block: %s\n"
" node mask: 0x%x\n"
" stack size: 0x%x\n"
" heap size: 0x%x\n"
" boot flags: 0x%x\n"
" force boot: %s\n"
" coremask set: %s\n"
" num cores set: %s\n"
" num skipped set: %s\n"
" endbootargs: %s\n",
__func__,
boot_args.named_block ? boot_args.named_block : "none",
boot_args.node_mask,
boot_args.stack_size,
boot_args.heap_size,
boot_args.boot_flags,
boot_args.forceboot ? "true" : "false",
boot_args.coremask_set ? "true" : "false",
boot_args.num_cores_set ? "true" : "false",
boot_args.num_skipped_set ? "true" : "false",
boot_args.endbootargs ? "true" : "false");
debug(" num cores: ");
for (i = 0; i < CVMX_MAX_NODES; i++)
debug("%s%d", i > 0 ? ", " : "", boot_args.num_cores[i]);
debug("\n num skipped: ");
for (i = 0; i < CVMX_MAX_NODES; i++) {
debug("%s%d", i > 0 ? ", " : "", boot_args.num_skipped[i]);
debug("\n coremask:\n");
cvmx_coremask_dprint(&boot_args.coremask);
}
if (boot_args.endbootargs) {
debug("endbootargs set, adjusting argc from %d to %d, arg_count: %d, arg_start: %d\n",
argc, argc - (arg_count + arg_start), arg_count,
arg_start);
argc -= (arg_count + arg_start);
argv += (arg_count + arg_start);
}
/*
* numcores specification overrides a coremask on the same command line
*/
cvmx_coremask_copy(&core_mask, &boot_args.coremask);
/*
* Remove cores from coremask based on environment variable stored in
* flash
*/
if (validate_coremask(&core_mask) != 0) {
puts("Invalid coremask.\n");
return 1;
} else if (cvmx_coremask_is_empty(&core_mask)) {
puts("Coremask is empty after coremask_override mask. Nothing to do.\n");
return 0;
}
if (cvmx_coremask_intersects(&core_mask, &coremask_to_run)) {
puts("ERROR: Can't load code on core twice! Provided coremask:\n");
cvmx_coremask_print(&core_mask);
puts("overlaps previously loaded coremask:\n");
cvmx_coremask_print(&coremask_to_run);
return -1;
}
debug("Setting up boot descriptor block with core mask:\n");
cvmx_coremask_dprint(&core_mask);
/*
* Add coremask to global mask of cores that have been set up and are
* runable
*/
cvmx_coremask_or(&coremask_to_run, &coremask_to_run, &core_mask);
/*
* Load kernel ELF image, or try binary if ELF is not detected.
* This way the much smaller vmlinux.bin can also be started but
* has to be loaded at the correct address (ep as parameter).
*/
if (!valid_elf_image(addr))
printf("Booting binary image instead (vmlinux.bin)...\n");
else
addr = load_elf_image_shdr(addr);
/* Set kernel entry point */
kernel = (kernel_entry_t)addr;
/* Init bootmem list for Linux kernel booting */
if (!cvmx_bootmem_phy_mem_list_init(
gd->ram_size, OCTEON_RESERVED_LOW_MEM_SIZE,
(void *)CKSEG0ADDR(BOOTLOADER_BOOTMEM_DESC_SPACE))) {
printf("FATAL: Error initializing free memory list\n");
return 0;
}
first_core = cvmx_coremask_get_first_core(&coremask_to_run);
cvmx_coremask_for_each_core(core, &coremask_to_run) {
debug("%s: Activating core %d\n", __func__, core);
cvmx_bootinfo_array[core].core_mask =
cvmx_coremask_get32(&coremask_to_run);
cvmx_coremask_copy(&cvmx_bootinfo_array[core].ext_core_mask,
&coremask_to_run);
if (core == first_core)
cvmx_bootinfo_array[core].flags |= BOOT_FLAG_INIT_CORE;
cvmx_bootinfo_array[core].dram_size = gd->ram_size /
(1024 * 1024);
cvmx_bootinfo_array[core].dclock_hz = gd->mem_clk * 1000000;
cvmx_bootinfo_array[core].eclock_hz = gd->cpu_clk;
cvmx_bootinfo_array[core].led_display_base_addr = 0;
cvmx_bootinfo_array[core].phy_mem_desc_addr =
((u32)(u64)__cvmx_bootmem_internal_get_desc_ptr()) &
0x7ffffff;
cvmx_bootinfo_array[core].major_version = CVMX_BOOTINFO_MAJ_VER;
cvmx_bootinfo_array[core].minor_version = CVMX_BOOTINFO_MIN_VER;
cvmx_bootinfo_array[core].fdt_addr = virt_to_phys(gd->fdt_blob);
boot_desc[core].dram_size = gd->ram_size / (1024 * 1024);
boot_desc[core].cvmx_desc_vaddr =
virt_to_phys(&cvmx_bootinfo_array[core]);
boot_desc[core].desc_version = OCTEON_CURRENT_DESC_VERSION;
boot_desc[core].desc_size = sizeof(boot_desc[0]);
boot_desc[core].flags = cvmx_bootinfo_array[core].flags;
boot_desc[core].eclock_hz = cvmx_bootinfo_array[core].eclock_hz;
boot_desc[core].argc = argc;
for (i = 0; i < argc; i++)
boot_desc[core].argv[i] = (u32)virt_to_phys(argv[i]);
}
core = 0;
arg0 = argc;
arg1 = (u64)argv;
arg2 = 0x1; /* Core 0 sets init core for Linux */
arg3 = XKPHYS | virt_to_phys(&boot_desc[core]);
debug("## Transferring control to Linux (at address %p) ...\n", kernel);
/*
* Flush cache before jumping to application. Let's flush the
* whole SDRAM area, since we don't know the size of the image
* that was loaded.
*/
flush_cache(gd->ram_base, gd->ram_top - gd->ram_base);
/* Take all cores out of reset */
csr_wr(CVMX_CIU_PP_RST, 0);
sync();
/* Wait a short while for the other cores... */
mdelay(100);
/* Install boot code into moveable bus for NMI (other cores) */
nmi_code = (const u64 *)nmi_bootvector;
num_dwords = (((u64)&nmi_handler_para[0] - (u64)nmi_code) + 7) / 8;
ret = octeon_set_moveable_region(0x1fc00000, 0, true, nmi_code,
num_dwords);
if (ret) {
printf("Error installing NMI handler for SMP core startup\n");
return 0;
}
/* Write NMI handler parameters for Linux kernel booting */
nmi_handler_para[0] = (u64)kernel;
nmi_handler_para[1] = arg0;
nmi_handler_para[2] = arg1;
nmi_handler_para[3] = 0; /* Don't set init core for secondary cores */
nmi_handler_para[4] = arg3;
sync();
/* Wait a short while for the other cores... */
mdelay(100);
/*
* Cores have already been taken out of reset to conserve power.
* We need to send a NMI to get the cores out of their wait loop
*/
octeon_get_available_coremask(&avail_coremask);
debug("Available coremask:\n");
cvmx_coremask_dprint(&avail_coremask);
debug("Starting coremask:\n");
cvmx_coremask_dprint(&coremask_to_run);
debug("Sending NMIs to other cores\n");
if (octeon_has_feature(OCTEON_FEATURE_CIU3)) {
u64 avail_cm;
int node;
cvmx_coremask_for_each_node(node, node_mask) {
avail_cm = cvmx_coremask_get64_node(&avail_coremask,
node);
if (avail_cm != 0) {
debug("Sending NMI to node %d, coremask=0x%llx, CIU3_NMI=0x%llx\n",
node, avail_cm,
(node > 0 ? -1ull : -2ull) & avail_cm);
csr_wr(CVMX_CIU3_NMI,
(node > 0 ? -1ull : -2ull) & avail_cm);
}
}
} else {
csr_wr(CVMX_CIU_NMI,
-2ull & cvmx_coremask_get64(&avail_coremask));
}
debug("Done sending NMIs\n");
/* Wait a short while for the other cores... */
mdelay(100);
/*
* pass address parameter as argv[0] (aka command name),
* and all remaining args
* a0 = argc
* a1 = argv (32 bit physical addresses, not pointers)
* a2 = init core
* a3 = boot descriptor address
* a4/t0 = entry point (only used by assembly stub)
*/
kernel(arg0, arg1, arg2, arg3);
return 0;
}
U_BOOT_CMD(bootoctlinux, 32, 0, do_bootoctlinux,
"Boot from a linux ELF image in memory",
"elf_address [coremask=mask_to_run | numcores=core_cnt_to_run] "
"[forceboot] [skipcores=core_cnt_to_skip] [namedblock=name] [endbootargs] [app_args ...]\n"
"elf_address - address of ELF image to load. If 0, default load address\n"
" is used.\n"
"coremask - mask of cores to run on. Anded with coremask_override\n"
" environment variable to ensure only working cores are used\n"
"numcores - number of cores to run on. Runs on specified number of cores,\n"
" taking into account the coremask_override.\n"
"skipcores - only meaningful with numcores. Skips this many cores\n"
" (starting from 0) when loading the numcores cores.\n"
" For example, setting skipcores to 1 will skip core 0\n"
" and load the application starting at the next available core.\n"
"forceboot - if set, boots application even if core 0 is not in mask\n"
"namedblock - specifies a named block to load the kernel\n"
"endbootargs - if set, bootloader does not process any further arguments and\n"
" only passes the arguments that follow to the kernel.\n"
" If not set, the kernel gets the entire commnad line as\n"
" arguments.\n" "\n");
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