mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-22 09:58:52 +09:00
![Peng Fan](/assets/img/avatar_default.png)
Add mx6_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> Signed-off-by: Utkarsh Gupta <utkarsh.gupta@nxp.com> Reviewed-by: Tom Rini <trini@konsulko.com> Acked-by: Utkarsh Gupta <utkarsh.gupta@nxp.com>
160 lines
4.2 KiB
ArmAsm
160 lines
4.2 KiB
ArmAsm
/*
|
|
* Copyright (C) 2016 Freescale Semiconductor, Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#ifdef CONFIG_ROM_UNIFIED_SECTIONS
|
|
#define ROM_API_TABLE_BASE_ADDR_LEGACY 0x180
|
|
#define ROM_VERSION_OFFSET 0x80
|
|
#else
|
|
#define ROM_API_TABLE_BASE_ADDR_LEGACY 0xC0
|
|
#define ROM_VERSION_OFFSET 0x48
|
|
#endif
|
|
#define ROM_API_TABLE_BASE_ADDR_MX6DQ_TO15 0xC4
|
|
#define ROM_API_TABLE_BASE_ADDR_MX6DL_TO12 0xC4
|
|
#define ROM_API_HWCNFG_SETUP_OFFSET 0x08
|
|
#define ROM_VERSION_TO10 0x10
|
|
#define ROM_VERSION_TO12 0x12
|
|
#define ROM_VERSION_TO15 0x15
|
|
|
|
plugin_start:
|
|
|
|
push {r0-r4, lr}
|
|
|
|
imx6_ddr_setting
|
|
imx6_clock_gating
|
|
imx6_qos_setting
|
|
|
|
/*
|
|
* The following is to fill in those arguments for this ROM function
|
|
* pu_irom_hwcnfg_setup(void **start, size_t *bytes, const void *boot_data)
|
|
* This function is used to copy data from the storage media into DDR.
|
|
* start - Initial (possibly partial) image load address on entry.
|
|
* Final image load address on exit.
|
|
* bytes - Initial (possibly partial) image size on entry.
|
|
* Final image size on exit.
|
|
* boot_data - Initial @ref ivt Boot Data load address.
|
|
*/
|
|
adr r0, boot_data2
|
|
adr r1, image_len2
|
|
adr r2, boot_data2
|
|
|
|
#ifdef CONFIG_NOR_BOOT
|
|
#ifdef CONFIG_MX6SX
|
|
ldr r3, =ROM_VERSION_OFFSET
|
|
ldr r4, [r3]
|
|
cmp r4, #ROM_VERSION_TO10
|
|
bgt before_calling_rom___pu_irom_hwcnfg_setup
|
|
ldr r3, =0x00900b00
|
|
ldr r4, =0x50000000
|
|
str r4, [r3, #0x5c]
|
|
#else
|
|
ldr r3, =0x00900800
|
|
ldr r4, =0x08000000
|
|
str r4, [r3, #0xc0]
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* check the _pu_irom_api_table for the address
|
|
*/
|
|
before_calling_rom___pu_irom_hwcnfg_setup:
|
|
ldr r3, =ROM_VERSION_OFFSET
|
|
ldr r4, [r3]
|
|
#if defined(CONFIG_MX6SOLO) || defined(CONFIG_MX6DL)
|
|
ldr r3, =ROM_VERSION_TO12
|
|
cmp r4, r3
|
|
ldrge r3, =ROM_API_TABLE_BASE_ADDR_MX6DL_TO12
|
|
ldrlt r3, =ROM_API_TABLE_BASE_ADDR_LEGACY
|
|
#elif defined(CONFIG_MX6Q)
|
|
ldr r3, =ROM_VERSION_TO15
|
|
cmp r4, r3
|
|
ldrge r3, =ROM_API_TABLE_BASE_ADDR_MX6DQ_TO15
|
|
ldrlt r3, =ROM_API_TABLE_BASE_ADDR_LEGACY
|
|
#else
|
|
ldr r3, =ROM_API_TABLE_BASE_ADDR_LEGACY
|
|
#endif
|
|
ldr r4, [r3, #ROM_API_HWCNFG_SETUP_OFFSET]
|
|
blx r4
|
|
after_calling_rom___pu_irom_hwcnfg_setup:
|
|
|
|
/*
|
|
* ROM_API_HWCNFG_SETUP function enables MMU & Caches.
|
|
* Thus disable MMU & Caches.
|
|
*/
|
|
|
|
mrc p15, 0, r0, c1, c0, 0 /* read CP15 register 1 into r0*/
|
|
ands r0, r0, #0x1 /* check if MMU is enabled */
|
|
beq mmu_disable_notreq /* exit if MMU is already disabled */
|
|
|
|
/* Disable caches, MMU */
|
|
mrc p15, 0, r0, c1, c0, 0 /* read CP15 register 1 into r0 */
|
|
bic r0, r0, #(1 << 2) /* disable D Cache */
|
|
bic r0, r0, #0x1 /* clear bit 0 ; MMU off */
|
|
|
|
bic r0, r0, #(0x1 << 11) /* disable Z, branch prediction */
|
|
bic r0, r0, #(0x1 << 1) /* disable A, Strict alignment */
|
|
/* check enabled. */
|
|
mcr p15, 0, r0, c1, c0, 0 /* write CP15 register 1 */
|
|
mov r0, r0
|
|
mov r0, r0
|
|
mov r0, r0
|
|
mov r0, r0
|
|
|
|
mmu_disable_notreq:
|
|
NOP
|
|
|
|
/* To return to ROM from plugin, we need to fill in these argument.
|
|
* Here is what need to do:
|
|
* Need to construct the paramters for this function before return to ROM:
|
|
* plugin_download(void **start, size_t *bytes, UINT32 *ivt_offset)
|
|
*/
|
|
pop {r0-r4, lr}
|
|
push {r5}
|
|
ldr r5, boot_data2
|
|
str r5, [r0]
|
|
ldr r5, image_len2
|
|
str r5, [r1]
|
|
ldr r5, second_ivt_offset
|
|
str r5, [r2]
|
|
mov r0, #1
|
|
pop {r5}
|
|
|
|
/* return back to ROM code */
|
|
bx lr
|
|
|
|
/* make the following data right in the end of the output*/
|
|
.ltorg
|
|
|
|
#if (defined(CONFIG_NOR_BOOT) || defined(CONFIG_QSPI_BOOT))
|
|
#define FLASH_OFFSET 0x1000
|
|
#else
|
|
#define FLASH_OFFSET 0x400
|
|
#endif
|
|
|
|
/*
|
|
* second_ivt_offset is the offset from the "second_ivt_header" to
|
|
* "image_copy_start", which involves FLASH_OFFSET, plus the first
|
|
* ivt_header, the plugin code size itself recorded by "ivt2_header"
|
|
*/
|
|
|
|
second_ivt_offset: .long (ivt2_header + 0x2C + FLASH_OFFSET)
|
|
|
|
/*
|
|
* The following is the second IVT header plus the second boot data
|
|
*/
|
|
ivt2_header: .long 0x0
|
|
app2_code_jump_v: .long 0x0
|
|
reserv3: .long 0x0
|
|
dcd2_ptr: .long 0x0
|
|
boot_data2_ptr: .long 0x0
|
|
self_ptr2: .long 0x0
|
|
app_code_csf2: .long 0x0
|
|
reserv4: .long 0x0
|
|
boot_data2: .long 0x0
|
|
image_len2: .long 0x0
|
|
plugin2: .long 0x0
|