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i.MX6: Add some boot logic. Mostly just cloned from the SAMA5D

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This commit is contained in:
Gregory Nutt 2016-03-02 12:59:41 -06:00
parent bed5aa8731
commit 5703f72a94
7 changed files with 1038 additions and 1 deletions
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2
arch/arm/src/imx6/Make.defs
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@ -132,4 +132,4 @@ CHIP_ASRCS =
# i.MX6-specific C source files
CHIP_CSRCS = imx_memorymap.c
CHIP_CSRCS = imx_boot.c imx_memorymap.c

503
arch/arm/src/imx6/imx_boot.c Normal file
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@ -0,0 +1,503 @@
/****************************************************************************
* arch/arm/src/imx6/imx_boot.c
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <assert.h>
#include <debug.h>
#ifdef CONFIG_PAGING
# include <nuttx/page.h>
#endif
#include <arch/board/board.h>
#include "chip.h"
#include "arm.h"
#include "mmu.h"
#include "cache.h"
#include "fpu.h"
#include "up_internal.h"
#include "up_arch.h"
#include "imx_clockconfig.h"
#include "imx_memorymap.h"
#include "imx_lowputc.h"
#include "imx_serial.h"
#include "imx_boot.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/* Symbols defined via the linker script */
extern uint32_t _vector_start; /* Beginning of vector block */
extern uint32_t _vector_end; /* End+1 of vector block */
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: imx_setupmappings
*
* Description
* Map all of the initial memory regions defined in g_section_mapping[]
*
****************************************************************************/
#ifndef CONFIG_ARCH_ROMPGTABLE
static inline void imx_setupmappings(void)
{
int i;
/* Set up each group of section mappings */
for (i = 0; i < g_num_mappings; i++)
{
mmu_l1_map_region(&g_section_mapping[i]);
}
}
#endif
/****************************************************************************
* Name: imx_remap
*
* Description
* Map all of the final memory regions defined in g_operational_mapping[]
*
****************************************************************************/
#ifdef NEED_SDRAM_REMAPPING
static inline void imx_remap(void)
{
int i;
/* Re-map each group of section */
for (i = 0; i < g_num_opmappings; i++)
{
mmu_l1_map_region(&g_operational_mapping[i]);
}
}
#endif
/****************************************************************************
* Name: imx_vectorpermissions
*
* Description:
* Set permissions on the vector mapping.
*
****************************************************************************/
#if !defined(CONFIG_ARCH_ROMPGTABLE) && defined(CONFIG_ARCH_LOWVECTORS) && \
defined(CONFIG_PAGING)
static void imx_vectorpermissions(uint32_t mmuflags)
{
/* The PTE for the beginning of OCRAM is at the base of the L2 page table */
uint32_t pte = mmu_l2_getentry(PG_L2_VECT_VADDR, 0);
/* Mask out the old MMU flags from the page table entry.
*
* The pte might be zero the first time this function is called.
*/
if (pte == 0)
{
pte = PG_VECT_PBASE;
}
else
{
pte &= PG_L1_PADDRMASK;
}
/* Update the page table entry with the MMU flags and save */
mmu_l2_setentry(PG_L2_VECT_VADDR, pte, 0, mmuflags);
}
#endif
/****************************************************************************
* Name: imx_vectorsize
*
* Description:
* Return the size of the vector data
*
****************************************************************************/
static inline size_t imx_vectorsize(void)
{
uintptr_t src;
uintptr_t end;
src = (uintptr_t)&_vector_start;
end = (uintptr_t)&_vector_end;
return (size_t)(end - src);
}
/****************************************************************************
* Name: imx_vectormapping
*
* Description:
* Setup a special mapping for the interrupt vectors when (1) the
* interrupt vectors are not positioned in ROM, and when (2) the interrupt
* vectors are located at the high address, 0xffff0000. When the
* interrupt vectors are located in ROM, we just have to assume that they
* were set up correctly; When vectors are located in low memory,
* 0x00000000, the mapping for the ROM memory region will be suppressed.
*
****************************************************************************/
#if !defined(CONFIG_ARCH_ROMPGTABLE) && !defined(CONFIG_ARCH_LOWVECTORS)
static void imx_vectormapping(void)
{
uint32_t vector_paddr = IMX_VECTOR_PADDR & PTE_SMALL_PADDR_MASK;
uint32_t vector_vaddr = IMX_VECTOR_VADDR & PTE_SMALL_PADDR_MASK;
uint32_t vector_size = (uint32_t)&_vector_end - (uint32_t)&_vector_start;
uint32_t end_paddr = IMX_VECTOR_PADDR + vector_size;
/* REVISIT: Cannot really assert in this context */
DEBUGASSERT (vector_size <= VECTOR_TABLE_SIZE);
/* We want to keep our interrupt vectors and interrupt-related logic in
* on-chip RAM (OCRAM). The i.MX6 has 256Kb of OCRAM positioned at
* physical address 0x0090:0000; we need to map this to 0xffff:0000.
*/
while (vector_paddr < end_paddr)
{
mmu_l2_setentry(VECTOR_L2_VBASE, vector_paddr, vector_vaddr,
MMU_L2_VECTORFLAGS);
vector_paddr += 4096;
vector_vaddr += 4096;
}
/* Now set the level 1 descriptor to refer to the level 2 page table. */
mmu_l1_setentry(VECTOR_L2_PBASE & PMD_PTE_PADDR_MASK,
IMX_VECTOR_VADDR & PMD_PTE_PADDR_MASK,
MMU_L1_VECTORFLAGS);
}
#else
/* No vector remap */
# define imx_vectormapping()
#endif
/****************************************************************************
* Name: imx_copyvectorblock
*
* Description:
* Copy the interrupt block to its final destination. Vectors are already
* positioned at the beginning of the text region and only need to be
* copied in the case where we are using high vectors or where the beginning
* of the text region cannot be remapped to address zero.
*
****************************************************************************/
#if !defined(CONFIG_ARCH_LOWVECTORS)
static void imx_copyvectorblock(void)
{
uint32_t *src;
uint32_t *end;
uint32_t *dest;
#ifdef CONFIG_PAGING
/* If we are using re-mapped vectors in an area that has been marked
* read only, then temporarily mark the mapping write-able (non-buffered).
*/
imx_vectorpermissions(MMU_L2_VECTRWFLAGS);
#endif
/* Copy the vectors into OCRAM at the address that will be mapped to the vector
* address:
*
* IMX_VECTOR_PADDR - Unmapped, physical address of vector table in SRAM
* IMX_VECTOR_VSRAM - Virtual address of vector table in SRAM
* IMX_VECTOR_VADDR - Virtual address of vector table (0x00000000 or
* 0xffff0000)
*/
src = (uint32_t *)&_vector_start;
end = (uint32_t *)&_vector_end;
dest = (uint32_t *)IMX_VECTOR_VSRAM;
while (src < end)
{
*dest++ = *src++;
}
#if !defined(CONFIG_ARCH_LOWVECTORS) && defined(CONFIG_PAGING)
/* Make the vectors read-only, cacheable again */
imx_vectorpermissions(MMU_L2_VECTORFLAGS);
#else
/* Flush the DCache to assure that the vector data is in physical RAM */
arch_clean_dcache((uintptr_t)IMX_VECTOR_VSRAM,
(uintptr_t)IMX_VECTOR_VSRAM + imx_vectorsize());
#endif
}
#else
/* Don't copy the vectors */
# define imx_copyvectorblock()
#endif
/****************************************************************************
* Name: imx_wdtdisable
*
* Description:
* Disable the watchdog timer. The i.MX6 always boots with the watchdog
* timer enabled at its maximum timeout (16 seconds). The watchdog timer
* can disabled by writing to the Watchdog Mode Register (WDT_MR). The
* WDT_MR, however, can be written only one time after the CPU has been
* reset.
*
* So if no watchdog timer driver has been configured, the watchdog timer
* must be disabled as part of the start up logic. But, on the other
* hand, we must not write to the WDT_MR register if the watchdog timer
* driver is configured. In that case, some later application will
* configure the WDT and begin periodic pinging (within 16 seconds,
* hopefully).
*
****************************************************************************/
#ifndef CONFIG_IMX6_WDT
static inline void imx_wdtdisable(void)
{
# warning REVISIT WDT initialization
}
#else
# define imx_wdtdisable()
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_boot
*
* Description:
* Complete boot operations started in arm_head.S
*
* Boot Sequence
*
* This logic may be executing in OCRAM or in external memory: CS0, DDR,
* CS1, CS2, or CS3. It may be executing in CS0 or OCRAM through the
* action of the i.MX6 "first level bootloader;" it might be executing in
* CS1-3 through the action of some second level bootloader that provides
* configuration for those memories.
*
* The system always boots from the ROM memory at address 0x0000:0000,
* starting the internal first level bootloader. That bootloader can be
* configured to work in different ways using the BMS pin and the contents
* of the Boot Sequence Configuration Register (BSC_CR).
*
* If the BMS_BIT is read "1", then the first level bootloader will
* support execution of code in the memory connected to CS0 on the EBI
* interface (presumably NOR flash). The following sequence is performed
* by the first level bootloader if BMS_BIT is "1":
*
* - The main clock is the on-chip 12 MHz RC oscillator,
* - The Static Memory Controller is configured with timing allowing
* code execution in CS0 external memory at 12 MHz
* - AXI matrix is configured to remap EBI CS0 address at 0x0
* - 0x0000:0000 is loaded in the Program Counter register
*
* The user software in the external memory must perform the next
* operation in order to complete the clocks and SMC timings configuration
* to run at a higher clock frequency:
*
* - Enable the 32768 Hz oscillator if best accuracy is needed
* - Reprogram the SMC setup, cycle, hold, mode timing registers for EBI
* CS0, to adapt them to the new clock.
* - Program the PMC (Main Oscillator Enable or Bypass mode)
* - Program and Start the PLL
* - Switch the system clock to the new value
*
* If the BMS_BIT is read "0", then the first level bootloader will
* perform:
*
* - Basic chip initialization: XTal or external clock frequency
* detection:
*
* a. Stack Setup for ARM supervisor mode
* b. Main Oscillator Detection: The bootloader attempts to use an
* external crystal. If this is not successful, then the 12 MHz
* Fast RC internal oscillator is used as the main osciallator.
* c. Main Clock Selection: The Master Clock source is switched from
* to the main oscillator without prescaler. PCK and MCK are now
* the Main Clock.
* d. PLLA Initialization: PLLA is configured to get a PCK at 96 MHz
* and an MCK at 48 MHz. If an external clock or crystal frequency
* running at 12 MHz is found, then the PLLA is configured to allow
* USB communication.
*
* - Attempt to retrieve a valid code from external non-volatile
* memories (NVM): SPI0 CS0 Flash Boot, SD Card Boot, NAND Flash Boot,
* SPI0 CS1 Flash Boot, or TWI EEPROM Boot. Different heuristics are
* used with each media type. If a valid image is found, it is copied
* to internal SRAM and started.
*
****************************************************************************/
void up_boot(void)
{
#ifdef CONFIG_ARCH_RAMFUNCS
const uint32_t *src;
uint32_t *dest;
#endif
#ifndef CONFIG_ARCH_ROMPGTABLE
/* __start provided the basic MMU mappings for SRAM. Now provide mappings
* for all IO regions (Including the vector region).
*/
imx_setupmappings();
/* Provide a special mapping for the IRAM interrupt vector positioned in
* high memory.
*/
imx_vectormapping();
#endif /* CONFIG_ARCH_ROMPGTABLE */
#ifdef CONFIG_ARCH_RAMFUNCS
/* Copy any necessary code sections from FLASH to RAM. The correct
* destination in SRAM is given by _sramfuncs and _eramfuncs. The
* temporary location is in flash after the data initialization code
* at _framfuncs
*/
for (src = &_framfuncs, dest = &_sramfuncs; dest < &_eramfuncs; )
{
*dest++ = *src++;
}
/* Flush the copied RAM functions into physical RAM so that will
* be available when fetched into the I-Cache.
*/
arch_clean_dcache((uintptr_t)&_sramfuncs, (uintptr_t)&_eramfuncs)
#endif
/* Setup up vector block. _vector_start and _vector_end are exported from
* arm_vector.S
*/
imx_copyvectorblock();
/* Disable the watchdog timer */
imx_wdtdisable();
/* Initialize clocking to settings provided by board-specific logic */
imx_clockconfig();
#ifdef CONFIG_ARCH_FPU
/* Initialize the FPU */
arm_fpuconfig();
#endif
/* Perform board-specific initialization, This must include:
*
* - Initialization of board-specific memory resources (e.g., SDRAM)
* - Configuration of board specific resources (PIOs, LEDs, etc).
*
* NOTE: We must use caution prior to this point to make sure that
* the logic does not access any global variables that might lie
* in SDRAM.
*/
imx_board_initialize();
#ifdef NEED_SDRAM_REMAPPING
/* SDRAM was configured in a temporary state to support low-level
* initialization. Now that the SDRAM has been fully initialized,
* we can reconfigure the SDRAM in its final, fully cache-able state.
*/
imx_remap();
#endif
#ifdef CONFIG_BOOT_SDRAM_DATA
/* If .data and .bss reside in SDRAM, then initialize the data sections
* now after SDRAM has been initialized.
*/
arm_data_initialize();
#endif
/* Perform common, low-level chip initialization (might do nothing) */
imx_lowsetup();
#ifdef USE_EARLYSERIALINIT
/* Perform early serial initialization if we are going to use the serial
* driver.
*/
imx_earlyserialinit();
#endif
}

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arch/arm/src/imx6/imx_boot.h Normal file
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/****************************************************************************
* arch/arm/src/imx/imx_boot.h
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_IMX6_IMX_BOOT_H
#define __ARCH_ARM_SRC_IMX6_IMX_BOOT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include "up_internal.h"
#include "chip.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Inline Functions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: imx_board_initialize
*
* Description:
* All i.MX6 architectures must provide the following entry point. This
* entry point is called early in the initialization -- after all memory
* has been configured and mapped but before any devices have been
* initialized.
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
void imx_board_initialize(void);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_IMX6_IMX_BOOT_H */

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arch/arm/src/imx6/imx_clockconfig.h Normal file
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/****************************************************************************
* arch/arm/src/imx6/imx_clockconfig.h
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_IMX6_IMX_CLOCKCONFIG_H
#define __ARCH_ARM_SRC_IMX6_IMX_CLOCKCONFIG_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include "up_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Inline Functions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: imx_clockconfig
*
* Description:
* Called to initialize the i.MX6. This does whatever setup is needed to
* put the SoC in a usable state. This includes the initialization of
* clocking using the settings in board.h.
*
****************************************************************************/
void imx_clockconfig(void);
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_IMX6_IMX_CLOCKCONFIG_H */

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arch/arm/src/imx6/imx_config.h Normal file
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/****************************************************************************
* arch/arm/src/imx6/imx_config.h
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_IMX6_IMX_CONFIG_H
#define __ARCH_ARM_SRC_IMX6_IMX_CONFIG_H 1
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration **********************************************************/
/* Is there a UART enabled? */
#if defined(CONFIG_IMX6_UART0) || defined(CONFIG_IMX6_UART1) || \
defined(CONFIG_IMX6_UART2) || defined(CONFIG_IMX6_UART3) || \
defined(CONFIG_IMX6_UART4)
# define IMX6_HAVE_UART
#endif
#undef SUPPRESS_CONSOLE_CONFIG
#ifdef CONFIG_SUPPRESS_UART_CONFIG
# define SUPPRESS_CONSOLE_CONFIG 1
#endif
/* Is there a serial console? It could be on UART0-4 or USART0-3 */
#if defined(CONFIG_UART0_SERIAL_CONSOLE) && defined(CONFIG_IMX6_UART0)
# undef CONFIG_UART1_SERIAL_CONSOLE
# undef CONFIG_UART2_SERIAL_CONSOLE
# undef CONFIG_UART3_SERIAL_CONSOLE
# undef CONFIG_UART4_SERIAL_CONSOLE
# define IMX6_HAVE_UART_CONSOLE 1
#elif defined(CONFIG_UART1_SERIAL_CONSOLE) && defined(CONFIG_IMX6_UART1)
# undef CONFIG_UART0_SERIAL_CONSOLE
# undef CONFIG_UART2_SERIAL_CONSOLE
# undef CONFIG_UART3_SERIAL_CONSOLE
# undef CONFIG_UART4_SERIAL_CONSOLE
# define IMX6_HAVE_UART_CONSOLE 1
#elif defined(CONFIG_UART2_SERIAL_CONSOLE) && defined(CONFIG_IMX6_UART2)
# undef CONFIG_UART0_SERIAL_CONSOLE
# undef CONFIG_UART1_SERIAL_CONSOLE
# undef CONFIG_UART3_SERIAL_CONSOLE
# undef CONFIG_UART4_SERIAL_CONSOLE
# define IMX6_HAVE_UART_CONSOLE 1
#elif defined(CONFIG_UART3_SERIAL_CONSOLE) && defined(CONFIG_IMX6_UART3)
# undef CONFIG_UART0_SERIAL_CONSOLE
# undef CONFIG_UART1_SERIAL_CONSOLE
# undef CONFIG_UART2_SERIAL_CONSOLE
# undef CONFIG_UART4_SERIAL_CONSOLE
# define IMX6_HAVE_UART_CONSOLE 1
#elif defined(CONFIG_UART4_SERIAL_CONSOLE) && defined(CONFIG_IMX6_UART4)
# undef CONFIG_UART0_SERIAL_CONSOLE
# undef CONFIG_UART1_SERIAL_CONSOLE
# undef CONFIG_UART2_SERIAL_CONSOLE
# undef CONFIG_UART3_SERIAL_CONSOLE
# define IMX6_HAVE_UART_CONSOLE 1
#else
# warning "No valid CONFIG_UARTn/USARTn_SERIAL_CONSOLE Setting"
# undef CONFIG_UART0_SERIAL_CONSOLE
# undef CONFIG_UART1_SERIAL_CONSOLE
# undef CONFIG_UART2_SERIAL_CONSOLE
# undef CONFIG_UART3_SERIAL_CONSOLE
# undef CONFIG_UART4_SERIAL_CONSOLE
# undef IMX6_HAVE_UART_CONSOLE
#endif
#endif /* __ARCH_ARM_SRC_IMX6_IMX_CONFIG_H */

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arch/arm/src/imx6/imx_lowputc.h Normal file
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/****************************************************************************
* arch/arm/src/imx/imx_lowputc.h
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_IMX6_IMX_LOWPUTC_H
#define __ARCH_ARM_SRC_IMX6_IMX_LOWPUTC_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include "up_internal.h"
#include "chip.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Inline Functions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: imx_lowsetup
*
* Description:
* Called at the very beginning of _start. Performs low level
* initialization including setup of the console UART. This UART done
* early so that the serial console is available for debugging very early
* in the boot sequence.
*
****************************************************************************/
void imx_lowsetup(void);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_IMX6_IMX_LOWPUTC_H */

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/****************************************************************************
* arch/arm/src/imx6/imx_serial.h
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_IMX6_IMX_SERIAL_H
#define __ARCH_ARM_SRC_IMX6_IMX_SERIAL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include "up_internal.h"
#include "imx_config.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Inline Functions
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: imx_earlyserialinit
*
* Description:
* Performs the low level UART initialization early in debug so that the
* serial console will be available during bootup. This must be called
* before up_serialinit.
*
****************************************************************************/
#ifdef USE_EARLYSERIALINIT
void imx_earlyserialinit(void);
#endif
/****************************************************************************
* Name: uart_earlyserialinit
*
* Description:
* Performs the low level UART initialization early in debug so that the
* serial console will be available during bootup. This must be called
* before up_serialinit.
*
****************************************************************************/
#if defined(USE_EARLYSERIALINIT) && defined(IMX6_HAVE_UART)
void uart_earlyserialinit(void);
#endif
/****************************************************************************
* Name: uart_serialinit
*
* Description:
* Register the UART serial console and serial ports. This assumes that
* uart_earlyserialinit was called previously.
*
****************************************************************************/
#ifdef IMX6_HAVE_UART
void uart_serialinit(void);
#endif
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_IMX6_IMX_SERIAL_H */