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https://github.com/smaeul/u-boot.git
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ac1475ae29
Add mx7_plugin.S which calls boot rom setup function, generate the second ivt, and jump back to boot rom. Signed-off-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Ye Li <ye.li@nxp.com> Cc: Stefano Babic <sbabic@denx.de> Reviewed-by: Tom Rini <trini@konsulko.com>
112 lines
2.7 KiB
ArmAsm
112 lines
2.7 KiB
ArmAsm
/*
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* Copyright (C) 2016 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#define ROM_API_TABLE_BASE_ADDR_LEGACY 0x180
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#define ROM_VERSION_OFFSET 0x80
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#define ROM_API_HWCNFG_SETUP_OFFSET 0x08
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plugin_start:
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push {r0-r4, lr}
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imx7_ddr_setting
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imx7_clock_gating
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imx7_qos_setting
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/*
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* Check if we are in USB serial download mode and immediately return to ROM
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* Need to check USB CTRL clock firstly, then check the USBx_nASYNCLISTADDR
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*/
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ldr r0, =0x30384680
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ldr r1, [r0]
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cmp r1, #0
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beq normal_boot
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ldr r0, =0x30B10158
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ldr r1, [r0]
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cmp r1, #0
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beq normal_boot
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pop {r0-r4, lr}
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bx lr
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normal_boot:
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/*
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* The following is to fill in those arguments for this ROM function
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* pu_irom_hwcnfg_setup(void **start, size_t *bytes, const void *boot_data)
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* This function is used to copy data from the storage media into DDR.
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* start - Initial (possibly partial) image load address on entry.
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* Final image load address on exit.
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* bytes - Initial (possibly partial) image size on entry.
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* Final image size on exit.
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* boot_data - Initial @ref ivt Boot Data load address.
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*/
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adr r0, boot_data2
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adr r1, image_len2
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adr r2, boot_data2
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/*
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* check the _pu_irom_api_table for the address
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*/
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before_calling_rom___pu_irom_hwcnfg_setup:
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ldr r3, =ROM_VERSION_OFFSET
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ldr r4, [r3]
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ldr r3, =ROM_API_TABLE_BASE_ADDR_LEGACY
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ldr r4, [r3, #ROM_API_HWCNFG_SETUP_OFFSET]
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blx r4
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after_calling_rom___pu_irom_hwcnfg_setup:
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/* To return to ROM from plugin, we need to fill in these argument.
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* Here is what need to do:
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* Need to construct the paramters for this function before return to ROM:
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* plugin_download(void **start, size_t *bytes, UINT32 *ivt_offset)
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*/
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pop {r0-r4, lr}
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push {r5}
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ldr r5, boot_data2
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str r5, [r0]
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ldr r5, image_len2
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str r5, [r1]
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ldr r5, second_ivt_offset
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str r5, [r2]
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mov r0, #1
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pop {r5}
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/* return back to ROM code */
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bx lr
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/* make the following data right in the end of the output*/
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.ltorg
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#define FLASH_OFFSET 0x400
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/*
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* second_ivt_offset is the offset from the "second_ivt_header" to
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* "image_copy_start", which involves FLASH_OFFSET, plus the first
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* ivt_header, the plugin code size itself recorded by "ivt2_header"
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*/
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second_ivt_offset: .long (ivt2_header + 0x2C + FLASH_OFFSET)
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/*
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* The following is the second IVT header plus the second boot data
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*/
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ivt2_header: .long 0x0
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app2_code_jump_v: .long 0x0
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reserv3: .long 0x0
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dcd2_ptr: .long 0x0
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boot_data2_ptr: .long 0x0
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self_ptr2: .long 0x0
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app_code_csf2: .long 0x0
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reserv4: .long 0x0
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boot_data2: .long 0x0
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image_len2: .long 0x0
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plugin2: .long 0x0
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