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/***********************license start***************
 * Copyright (c) 2003-2010  Cavium Networks (support@cavium.com). All rights
 * reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.

 *   * Neither the name of Cavium Networks nor the names of
 *     its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written
 *     permission.

 * This Software, including technical data, may be subject to U.S. export  control
 * laws, including the U.S. Export Administration Act and its  associated
 * regulations, and may be subject to export or import  regulations in other
 * countries.

 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
 * AND WITH ALL FAULTS AND CAVIUM  NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
 * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
 * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
 * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
 * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
 * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
 * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
 * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE  RISK ARISING OUT OF USE OR
 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
 ***********************license end**************************************/







#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "cvmx-config.h"
#include "cvmx.h"
#include "cvmx-spinlock.h"
#include <octeon-app-init.h>
#include "cvmx-sysinfo.h"
#include "cvmx-bootmem.h"
#include "cvmx-uart.h"
#include "cvmx-coremask.h"
#include "cvmx-core.h"
#include "cvmx-interrupt.h"
#include "cvmx-ebt3000.h"
#include "cvmx-sim-magic.h"
#include "cvmx-debug.h"
#include "../../bootloader/u-boot/include/octeon_mem_map.h"

int cvmx_debug_uart = -1;

/**
 * @file
 *
 * Main entry point for all simple executive based programs.
 */


extern void cvmx_interrupt_initialize(void);



/**
 * Main entry point for all simple executive based programs.
 * This is the first C function called. It completes
 * initialization, calls main, and performs C level cleanup.
 *
 * @param app_desc_addr
 *               Address of the application description structure passed
 *               brom the boot loader.
 */
EXTERN_ASM void __cvmx_app_init(uint64_t app_desc_addr);


/**
 * Set up sysinfo structure from boot descriptor versions 6 and higher.
 * In these versions, the interesting data in not in the boot info structure
 * defined by the toolchain, but is in the cvmx_bootinfo structure defined in
 * the simple exec.
 *
 * @param app_desc_ptr
 *               pointer to boot descriptor block
 *
 * @param sys_info_ptr
 *               pointer to sysinfo structure to fill in
 */
static void process_boot_desc_ver_6(octeon_boot_descriptor_t *app_desc_ptr, cvmx_sysinfo_t *sys_info_ptr)
{
    cvmx_bootinfo_t *cvmx_bootinfo_ptr = CASTPTR(cvmx_bootinfo_t, app_desc_ptr->cvmx_desc_vaddr);

    /* copy application information for simple exec use */
    /* Populate the sys_info structure from the boot descriptor block created by the bootloader.
    ** The boot descriptor block is put in the top of the heap, so it will be overwritten when the
    ** heap is fully used.  Information that is to be used must be copied before that.
    ** Applications should only use the sys_info structure, not the boot descriptor
    */
    if (cvmx_bootinfo_ptr->major_version == 1)
    {
        sys_info_ptr->core_mask = cvmx_bootinfo_ptr->core_mask;
        sys_info_ptr->heap_base = cvmx_bootinfo_ptr->heap_base;
        sys_info_ptr->heap_size = cvmx_bootinfo_ptr->heap_end - cvmx_bootinfo_ptr->heap_base;
        sys_info_ptr->stack_top = cvmx_bootinfo_ptr->stack_top;
        sys_info_ptr->stack_size = cvmx_bootinfo_ptr->stack_size;
        sys_info_ptr->init_core = cvmx_get_core_num();
        sys_info_ptr->phy_mem_desc_addr = cvmx_bootinfo_ptr->phy_mem_desc_addr;
        sys_info_ptr->exception_base_addr = cvmx_bootinfo_ptr->exception_base_addr;
        sys_info_ptr->cpu_clock_hz  = cvmx_bootinfo_ptr->eclock_hz;
        sys_info_ptr->dram_data_rate_hz  = cvmx_bootinfo_ptr->dclock_hz * 2;

        sys_info_ptr->board_type = cvmx_bootinfo_ptr->board_type;
        sys_info_ptr->board_rev_major = cvmx_bootinfo_ptr->board_rev_major;
        sys_info_ptr->board_rev_minor = cvmx_bootinfo_ptr->board_rev_minor;
        memcpy(sys_info_ptr->mac_addr_base, cvmx_bootinfo_ptr->mac_addr_base, 6);
        sys_info_ptr->mac_addr_count = cvmx_bootinfo_ptr->mac_addr_count;
        memcpy(sys_info_ptr->board_serial_number, cvmx_bootinfo_ptr->board_serial_number, CVMX_BOOTINFO_OCTEON_SERIAL_LEN);
        sys_info_ptr->console_uart_num = 0;
        if (cvmx_bootinfo_ptr->flags & OCTEON_BL_FLAG_CONSOLE_UART1)
            sys_info_ptr->console_uart_num = 1;

        if (cvmx_bootinfo_ptr->dram_size > 32*1024*1024)
            sys_info_ptr->system_dram_size = (uint64_t)cvmx_bootinfo_ptr->dram_size;  /* older bootloaders incorrectly gave this in bytes, so don't convert */
        else
            sys_info_ptr->system_dram_size = (uint64_t)cvmx_bootinfo_ptr->dram_size * 1024 * 1024;  /* convert from Megabytes to bytes */
        if (cvmx_bootinfo_ptr->minor_version >= 1)
        {
            sys_info_ptr->compact_flash_common_base_addr = cvmx_bootinfo_ptr->compact_flash_common_base_addr;
            sys_info_ptr->compact_flash_attribute_base_addr = cvmx_bootinfo_ptr->compact_flash_attribute_base_addr;
            sys_info_ptr->led_display_base_addr = cvmx_bootinfo_ptr->led_display_base_addr;
        }
        else if (sys_info_ptr->board_type == CVMX_BOARD_TYPE_EBT3000 ||
                 sys_info_ptr->board_type == CVMX_BOARD_TYPE_EBT5800 ||
                 sys_info_ptr->board_type == CVMX_BOARD_TYPE_EBT5810)
        {
            /* Default these variables so that users of structure can be the same no
            ** matter what version fo boot info block the bootloader passes */
            sys_info_ptr->compact_flash_common_base_addr = 0x1d000000 + 0x800;
            sys_info_ptr->compact_flash_attribute_base_addr = 0x1d010000;
            if (sys_info_ptr->board_rev_major == 1)
                sys_info_ptr->led_display_base_addr = 0x1d020000;
            else
                sys_info_ptr->led_display_base_addr = 0x1d020000 + 0xf8;
        }
        else
        {
            sys_info_ptr->compact_flash_common_base_addr = 0;
            sys_info_ptr->compact_flash_attribute_base_addr = 0;
            sys_info_ptr->led_display_base_addr = 0;
        }

        if (cvmx_bootinfo_ptr->minor_version >= 2)
        {
            sys_info_ptr->dfa_ref_clock_hz = cvmx_bootinfo_ptr->dfa_ref_clock_hz;
            sys_info_ptr->bootloader_config_flags = cvmx_bootinfo_ptr->config_flags;
        }
        else
        {
            sys_info_ptr->dfa_ref_clock_hz = 0;
            sys_info_ptr->bootloader_config_flags = 0;
            if (app_desc_ptr->flags & OCTEON_BL_FLAG_DEBUG)
                sys_info_ptr->bootloader_config_flags |= CVMX_BOOTINFO_CFG_FLAG_DEBUG;
            if (app_desc_ptr->flags & OCTEON_BL_FLAG_NO_MAGIC)
                sys_info_ptr->bootloader_config_flags |= CVMX_BOOTINFO_CFG_FLAG_NO_MAGIC;
        }

    }
    else
    {
        printf("ERROR: Incompatible CVMX descriptor passed by bootloader: %d.%d\n",
               (int)cvmx_bootinfo_ptr->major_version, (int)cvmx_bootinfo_ptr->minor_version);
        exit(-1);
    }
}


/**
 * Interrupt handler for calling exit on Control-C interrupts.
 *
 * @param irq_number IRQ interrupt number
 * @param registers  CPU registers at the time of the interrupt
 * @param user_arg   Unused user argument
 */
static void process_break_interrupt(int irq_number, uint64_t registers[32], void *user_arg)
{
    /* Exclude new functionality when building with older toolchains */
#if OCTEON_APP_INIT_H_VERSION >= 3
    int uart = irq_number - CVMX_IRQ_UART0;
    cvmx_uart_lsr_t lsrval;

    /* Check for a Control-C interrupt from the console. This loop will eat
        all input received on the uart */
    lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart));
    while (lsrval.s.dr)
    {
        int c = cvmx_read_csr(CVMX_MIO_UARTX_RBR(uart));
        if (c == '\003')
        {
            register uint64_t tmp;

	    /* Wait for an another Control-C if right now we have no
	       access to the console.  After this point we hold the
	       lock and use a different lock to synchronize between
	       the memfile dumps from different cores.  As a
	       consequence regular printfs *don't* work after this
	       point! */
	    if (__octeon_uart_trylock () == 1)
		return;

            /* Pulse MCD0 signal on Ctrl-C to stop all the cores. Also
	       set the MCD0 to be not masked by this core so we know
	       the signal is received by someone */
            asm volatile (
                "dmfc0 %0, $22\n"
                "ori   %0, %0, 0x1110\n"
                "dmtc0 %0, $22\n"
                : "=r" (tmp));
        }
        lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart));
    }
#endif
}

/**
 * This is the debug exception handler with "break".  Before calling exit to
 * dump the profile-feedback output it releases the lock on the console.
 * This way if there is buffered data in stdout it can still be flushed.
 * stdio is required to flush all output during an fread.
 */

static void exit_on_break(void)
{
#if OCTEON_APP_INIT_H_VERSION >= 4
    unsigned int coremask = cvmx_sysinfo_get()->core_mask;

    cvmx_coremask_barrier_sync(coremask);
    if (cvmx_coremask_first_core(coremask))
      __octeon_uart_unlock();
#endif

    exit(0);
}

/* Add string signature to applications so that we can easily tell what
** Octeon revision they were compiled for. Don't make static to avoid unused
** variable warning. */
#define xstr(s) str(s)
#define str(s) #s

int octeon_model_version_check(uint32_t chip_id);

#define OMS xstr(OCTEON_MODEL)
char octeon_rev_signature[] =
#ifdef USE_RUNTIME_MODEL_CHECKS
    "Compiled for runtime Octeon model checking";
#else
    "Compiled for Octeon processor id: "OMS;
#endif

void __cvmx_app_init(uint64_t app_desc_addr)
{
    /* App descriptor used by bootloader */
    octeon_boot_descriptor_t *app_desc_ptr = CASTPTR(octeon_boot_descriptor_t, app_desc_addr);

    /* app info structure used by the simple exec */
    cvmx_sysinfo_t *sys_info_ptr = cvmx_sysinfo_get();
    int breakflag = 0;

    if (cvmx_coremask_first_core(app_desc_ptr->core_mask))
    {
        /* do once per application setup  */
        if (app_desc_ptr->desc_version < 6)
        {
            printf("Obsolete bootloader, can't run application\n");
            exit(-1);
        }
        else
        {
            /* Handle all newer versions here.... */
            if (app_desc_ptr->desc_version > 7)
            {
                printf("Warning: newer boot descripter version than expected\n");
            }
            process_boot_desc_ver_6(app_desc_ptr,sys_info_ptr);

        }
    }
    cvmx_coremask_barrier_sync(app_desc_ptr->core_mask);

    breakflag = sys_info_ptr->bootloader_config_flags & CVMX_BOOTINFO_CFG_FLAG_BREAK;

    /* No need to initialize bootmem, interrupts, interrupt handler and error handler
       if version does not match. */
    if (cvmx_coremask_first_core(sys_info_ptr->core_mask))
    {
        /* Check to make sure the Chip version matches the configured version */
        uint32_t chip_id = cvmx_get_proc_id();
        /* Make sure we can properly run on this chip */
        octeon_model_version_check(chip_id);
    }

    cvmx_interrupt_initialize();

    if (cvmx_coremask_first_core(sys_info_ptr->core_mask))
    {
        int break_uart = 0;
        unsigned int i;

        /* Intialize the bootmem allocator with the descriptor that was provided by
         * the bootloader
         * IMPORTANT:  All printfs must happen after this since PCI console uses named
         * blocks.
         */
        cvmx_bootmem_init(sys_info_ptr->phy_mem_desc_addr);
        if (breakflag && cvmx_debug_booted())
        {
            printf("ERROR: Using debug and break together in not supported.\n");
            while (1)
                ;
        }

        /* Search through the arguments for a break=X or a debug=X. */
        for (i = 0; i < app_desc_ptr->argc; i++)
        {
            const char *argv = CASTPTR(const char, CVMX_ADD_SEG32(CVMX_MIPS32_SPACE_KSEG0, app_desc_ptr->argv[i]));
            if (strncmp(argv, "break=", 6) == 0)
                break_uart = atoi(argv + 6);
            else if (strncmp(argv, "debug=", 6) == 0)
                cvmx_debug_uart = atoi(argv + 6);
        }

        if (breakflag)
        {
            int32_t *trampoline = CASTPTR(int32_t, CVMX_ADD_SEG32(CVMX_MIPS32_SPACE_KSEG0, BOOTLOADER_DEBUG_TRAMPOLINE));
            /* On debug exception, call exit_on_break from all cores. */
            *trampoline = (int32_t)(long)&exit_on_break;
            cvmx_uart_enable_intr(break_uart, process_break_interrupt);
        }
    }

    cvmx_coremask_barrier_sync(app_desc_ptr->core_mask);

    /* Clear BEV now that we have installed exception handlers. */
    uint64_t tmp;
    asm volatile (
               "   .set push                  \n"
               "   .set mips64                  \n"
               "   .set noreorder               \n"
               "   .set noat               \n"
               "   mfc0 %[tmp], $12, 0          \n"
               "   li   $at, 1 << 22            \n"
               "   not  $at, $at                \n"
               "   and  %[tmp], $at             \n"
               "   mtc0 %[tmp], $12, 0          \n"
               "   .set pop                  \n"
                  : [tmp] "=&r" (tmp) : );

    /* Set all cores to stop on MCD0 signals */
    asm volatile(
        "dmfc0 %0, $22, 0\n"
        "or %0, %0, 0x1100\n"
        "dmtc0 %0, $22, 0\n" : "=r" (tmp));

    CVMX_SYNC;

    /* Now intialize the debug exception handler as BEV is cleared. */
    if (!breakflag)
        cvmx_debug_init();

    /* Synchronise all cores at this point */
    cvmx_coremask_barrier_sync(app_desc_ptr->core_mask);

}

int cvmx_user_app_init(void)
{
    uint64_t bist_val;
    uint64_t mask;
    int bist_errors = 0;
    uint64_t tmp;
    uint64_t base_addr;


    /* Put message on LED display */
    if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM)
      ebt3000_str_write("CVMX    ");

    /* Check BIST results for COP0 registers, some values only meaningful in pass 2 */
    CVMX_MF_CACHE_ERR(bist_val);
    mask = (1ULL<<32) | (1ULL<<33) | (1ULL<<34) | (1ULL<<35) | (1ULL<<36);
    bist_val &= mask;
    if (bist_val)
    {
        printf("BIST FAILURE: COP0_CACHE_ERR: 0x%llx\n", (unsigned long long)bist_val);
        bist_errors++;
    }

    mask = 0xfc00000000000000ull;
    CVMX_MF_CVM_MEM_CTL(bist_val);
    bist_val &=  mask;
    if (bist_val)
    {
        printf("BIST FAILURE: COP0_CVM_MEM_CTL: 0x%llx\n", (unsigned long long)bist_val);
        bist_errors++;
    }

    /* Set up 4 cache lines of local memory, make available from Kernel space */
    CVMX_MF_CVM_MEM_CTL(tmp);
    tmp &= ~0x1ffull;
    tmp |= 0x104ull;
    /* Set WBTHRESH=4 as per Core-14752 errata in cn63xxp1.X. */
    if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X))
    {
        tmp &= ~(0xfull << 11);
        tmp |= 4 << 11;
    }
    CVMX_MT_CVM_MEM_CTL(tmp);


#if CVMX_USE_1_TO_1_TLB_MAPPINGS

    /* Check to see if the bootloader is indicating that the application is outside
    ** of the 0x10000000 0x20000000 range, in which case we can't use 1-1 mappings */
    if (cvmx_sysinfo_get()->bootloader_config_flags & CVMX_BOOTINFO_CFG_FLAG_OVERSIZE_TLB_MAPPING)
    {
        printf("ERROR: 1-1 TLB mappings configured and oversize application loaded.\n");
        printf("ERROR: Either 1-1 TLB mappings must be disabled or application size reduced.\n");
        exit(-1);
    }

    /* Create 1-1 Mappings for all DRAM up to 8 gigs, excluding the low 1 Megabyte.  This area
    ** is reserved for the bootloader and exception vectors.  By not mapping this area, NULL pointer
    ** dereferences will be caught with TLB exceptions.  Exception handlers should be written
    ** using XKPHYS or KSEG0 addresses. */
#if CVMX_NULL_POINTER_PROTECT
    /* Exclude low 1 MByte from mapping to detect NULL pointer accesses.
    ** The only down side of this is it uses more TLB mappings */
    cvmx_core_add_fixed_tlb_mapping_bits(0x0, 0x0, 0x100000  | TLB_DIRTY | TLB_VALID | TLB_GLOBAL, CVMX_TLB_PAGEMASK_1M);
    cvmx_core_add_fixed_tlb_mapping(0x200000, 0x200000, 0x300000, CVMX_TLB_PAGEMASK_1M);
    cvmx_core_add_fixed_tlb_mapping(0x400000, 0x400000, 0x500000, CVMX_TLB_PAGEMASK_1M);
    cvmx_core_add_fixed_tlb_mapping(0x600000, 0x600000, 0x700000, CVMX_TLB_PAGEMASK_1M);

    cvmx_core_add_fixed_tlb_mapping(0x800000,  0x800000,  0xC00000, CVMX_TLB_PAGEMASK_4M);
    cvmx_core_add_fixed_tlb_mapping(0x1000000, 0x1000000, 0x1400000, CVMX_TLB_PAGEMASK_4M);
    cvmx_core_add_fixed_tlb_mapping(0x1800000, 0x1800000, 0x1c00000, CVMX_TLB_PAGEMASK_4M);

    cvmx_core_add_fixed_tlb_mapping(0x2000000, 0x2000000, 0x3000000, CVMX_TLB_PAGEMASK_16M);
    cvmx_core_add_fixed_tlb_mapping(0x4000000, 0x4000000, 0x5000000, CVMX_TLB_PAGEMASK_16M);
    cvmx_core_add_fixed_tlb_mapping(0x6000000, 0x6000000, 0x7000000, CVMX_TLB_PAGEMASK_16M);
#else
    /* Map entire low 128 Megs, including 0x0 */
    cvmx_core_add_fixed_tlb_mapping(0x0, 0x0, 0x4000000ULL, CVMX_TLB_PAGEMASK_64M);
#endif
    cvmx_core_add_fixed_tlb_mapping(0x8000000ULL, 0x8000000ULL, 0xc000000ULL, CVMX_TLB_PAGEMASK_64M);

    if (OCTEON_IS_MODEL(OCTEON_CN6XXX))
    {
        for (base_addr = 0x20000000ULL; base_addr < (cvmx_sysinfo_get()->system_dram_size + 0x10000000ULL); base_addr += 0x20000000ULL)
        {
            if (0 > cvmx_core_add_fixed_tlb_mapping(base_addr,  base_addr,  base_addr + 0x10000000ULL, CVMX_TLB_PAGEMASK_256M))
            {
                printf("ERROR adding 1-1 TLB mapping for address 0x%llx\n", (unsigned long long)base_addr);
                /* Exit from here, as expected memory mappings aren't set
                   up if this fails */
		exit(-1);
            }
        }
    }
    else
    {
        /* Create 1-1 mapping for next 256 megs
        ** bottom page is not valid */
        cvmx_core_add_fixed_tlb_mapping_bits(0x400000000ULL, 0, 0x410000000ULL  | TLB_DIRTY | TLB_VALID | TLB_GLOBAL, CVMX_TLB_PAGEMASK_256M);

        /* Map from 0.5 up to the installed memory size in 512 MByte chunks.  If this loop runs out of memory,
        ** the NULL pointer detection can be disabled to free up more TLB entries. */
        if (cvmx_sysinfo_get()->system_dram_size > 0x20000000ULL)
        {
            for (base_addr = 0x20000000ULL; base_addr <= (cvmx_sysinfo_get()->system_dram_size - 0x20000000ULL); base_addr += 0x20000000ULL)
            {
                if (0 > cvmx_core_add_fixed_tlb_mapping(base_addr,  base_addr,  base_addr + 0x10000000ULL, CVMX_TLB_PAGEMASK_256M))
                {
                    printf("ERROR adding 1-1 TLB mapping for address 0x%llx\n", (unsigned long long)base_addr);
                    /* Exit from here, as expected memory mappings
                       aren't set up if this fails */
                    exit(-1);
                }
            }
        }
    }
#endif


    cvmx_sysinfo_t *sys_info_ptr = cvmx_sysinfo_get();
    cvmx_bootmem_init(sys_info_ptr->phy_mem_desc_addr);

    return(0);
}

void __cvmx_app_exit(void)
{
    cvmx_debug_finish();

    if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM)
    {
	CVMX_BREAK;
    }
    /* Hang forever, until more appropriate stand alone simple executive
       exit() is implemented */

    while (1);
}