diff options
Diffstat (limited to 'arch/arm/include/asm/arch-mx6/mx6_plugin.S')
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/mx6_plugin.S | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mx6/mx6_plugin.S b/arch/arm/include/asm/arch-mx6/mx6_plugin.S new file mode 100644 index 0000000..7e61d22 --- /dev/null +++ b/arch/arm/include/asm/arch-mx6/mx6_plugin.S @@ -0,0 +1,158 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2016 Freescale Semiconductor, Inc. + */ + +#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 |