[PATCH 1/2] rockchip: rk3588: Add support for ATAG parsing
Kever Yang
kever.yang at rock-chips.com
Wed Mar 27 11:32:06 CET 2024
Hi Chris,
The ATAGS is used for passing parameter from bootloader to kernel
at first, which has been replaced by DTB now for ARM platform.
And Rockchip using ATAGs for passing parameter like dram memory
size/board uart in different boot process like DRAM init binary/ TPL/SPL
to U-Boot since 2018.
And almost at the same time, Simon add bloblist for mainline U-Boot
which for similar purpose.
So I'm not sure if this ATAGS should be accept in mainline U-Boot
or not, even for rockchip platform only seems some kind of regression
for this feature support.
Hi Simon and Tom,
Could you help to give some suggestion for this?
Thanks,
- Kever
On 2024/3/27 04:49, Chris Morgan wrote:
> From: Chris Morgan <macromorgan at hotmail.com>
>
> Add support for parsing the ATAGs created by the Rockchip binary
> RAM init. This ATAG parsing code was taken from the Rockchip BSP
> U-Boot source and tested only on parsing the RAM specific ATAGs
> for the RK3588.
>
> Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
> ---
> arch/arm/include/asm/arch-rockchip/atags.h | 222 +++++++++++++++++++++
> arch/arm/mach-rockchip/Makefile | 1 +
> arch/arm/mach-rockchip/atags.c | 99 +++++++++
> 3 files changed, 322 insertions(+)
> create mode 100644 arch/arm/include/asm/arch-rockchip/atags.h
> create mode 100644 arch/arm/mach-rockchip/atags.c
>
> diff --git a/arch/arm/include/asm/arch-rockchip/atags.h b/arch/arm/include/asm/arch-rockchip/atags.h
> new file mode 100644
> index 0000000000..9bae66d7f8
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-rockchip/atags.h
> @@ -0,0 +1,222 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * (C) Copyright 2018 Rockchip Electronics Co., Ltd
> + *
> + */
> +
> +#ifndef __RK_ATAGS_H_
> +#define __RK_ATAGS_H_
> +
> +/* Tag magic */
> +#define ATAG_CORE 0x54410001
> +#define ATAG_NONE 0x00000000
> +
> +#define ATAG_SERIAL 0x54410050
> +#define ATAG_BOOTDEV 0x54410051
> +#define ATAG_DDR_MEM 0x54410052
> +#define ATAG_TOS_MEM 0x54410053
> +#define ATAG_RAM_PARTITION 0x54410054
> +#define ATAG_ATF_MEM 0x54410055
> +#define ATAG_PUB_KEY 0x54410056
> +#define ATAG_SOC_INFO 0x54410057
> +#define ATAG_BOOT1_PARAM 0x54410058
> +#define ATAG_PSTORE 0x54410059
> +#define ATAG_FWVER 0x5441005a
> +#define ATAG_MAX 0x544100ff
> +
> +/* Tag size and offset */
> +#define ATAGS_SIZE (0x2000) /* 8K */
> +#define ATAGS_OFFSET (0x200000 - ATAGS_SIZE)/* [2M-8K, 2M] */
> +#define ATAGS_PHYS_BASE (CFG_SYS_SDRAM_BASE + ATAGS_OFFSET)
> +
> +/* tag_fwver.ver[fwid][] */
> +#define FWVER_LEN 36
> +
> +enum fwid {
> + FW_DDR,
> + FW_SPL,
> + FW_ATF,
> + FW_TEE,
> + FW_MAX,
> +};
> +
> +struct tag_serial {
> + u32 version;
> + u32 enable;
> + u64 addr;
> + u32 baudrate;
> + u32 m_mode;
> + u32 id;
> + u32 reserved[2];
> + u32 hash;
> +} __packed;
> +
> +struct tag_bootdev {
> + u32 version;
> + u32 devtype;
> + u32 devnum;
> + u32 mode;
> + u32 sdupdate;
> + u32 reserved[6];
> + u32 hash;
> +} __packed;
> +
> +struct tag_ddr_mem {
> + u32 count;
> + u32 version;
> + u64 bank[20];
> + u32 flags;
> + u32 data[2];
> + u32 hash;
> +} __packed;
> +
> +struct tag_tos_mem {
> + u32 version;
> + struct {
> + char name[8];
> + u64 phy_addr;
> + u32 size;
> + u32 flags;
> + } tee_mem;
> +
> + struct {
> + char name[8];
> + u64 phy_addr;
> + u32 size;
> + u32 flags;
> + } drm_mem;
> +
> + u64 reserved[7];
> + u32 reserved1;
> + u32 hash;
> +} __packed;
> +
> +struct tag_atf_mem {
> + u32 version;
> + u64 phy_addr;
> + u32 size;
> + u32 flags;
> + u32 reserved[2];
> + u32 hash;
> +} __packed;
> +
> +struct tag_pub_key {
> + u32 version;
> + u32 len;
> + u8 data[768]; /* u32 rsa_n[64], rsa_e[64], rsa_c[64] */
> + u32 flag;
> + u32 reserved[5];
> + u32 hash;
> +} __packed;
> +
> +struct tag_ram_partition {
> + u32 version;
> + u32 count;
> + u32 reserved[4];
> +
> + struct {
> + char name[16];
> + u64 start;
> + u64 size;
> + } part[6];
> +
> + u32 reserved1[3];
> + u32 hash;
> +} __packed;
> +
> +struct tag_soc_info {
> + u32 version;
> + u32 name; /* Hex: 0x3288, 0x3399... */
> + u32 flags;
> + u32 reserved[6];
> + u32 hash;
> +} __packed;
> +
> +struct tag_boot1p {
> + u32 version;
> + u32 param[8];
> + u32 reserved[4];
> + u32 hash;
> +} __packed;
> +
> +struct tag_pstore {
> + u32 version;
> + struct {
> + u32 addr;
> + u32 size;
> + } buf[16];
> + u32 hash;
> +} __packed;
> +
> +struct tag_fwver {
> + u32 version;
> + char ver[8][FWVER_LEN];
> + u32 hash;
> +} __packed;
> +
> +struct tag_core {
> + u32 flags;
> + u32 pagesize;
> + u32 rootdev;
> +} __packed;
> +
> +struct tag_header {
> + u32 size; /* bytes = size * 4 */
> + u32 magic;
> +} __packed;
> +
> +/* Must be 4 bytes align */
> +struct tag {
> + struct tag_header hdr;
> + union {
> + struct tag_core core;
> + struct tag_serial serial;
> + struct tag_bootdev bootdev;
> + struct tag_ddr_mem ddr_mem;
> + struct tag_tos_mem tos_mem;
> + struct tag_ram_partition ram_part;
> + struct tag_atf_mem atf_mem;
> + struct tag_pub_key pub_key;
> + struct tag_soc_info soc;
> + struct tag_boot1p boot1p;
> + struct tag_pstore pstore;
> + struct tag_fwver fwver;
> + } u;
> +} __aligned(4);
> +
> +#define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
> +#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
> +#define for_each_tag(t, base) \
> + for (t = base; t->hdr.size; t = tag_next(t))
> +
> +/*
> + * atags_get_tag - get tag by tag magic
> + *
> + * @magic: tag magic, i.e. ATAG_SERIAL, ATAG_BOOTDEV, ...
> + *
> + * return: NULL on failed, otherwise return the tag that we want.
> + */
> +struct tag *atags_get_tag(u32 magic);
> +
> +/*
> + * atags_is_available - check if atags is available, used for second or
> + * later pre-loaders.
> + *
> + * return: 0 is not available, otherwise available.
> + */
> +int atags_is_available(void);
> +
> +/*
> + * atags_overflow - check if atags is overflow
> + *
> + * return: 0 if not overflow, otherwise overflow.
> + */
> +int atags_overflow(struct tag *t);
> +
> +/*
> + * atags_bad_magic - check if atags magic is invalid.
> + *
> + * return: 1 if invalid, otherwise valid.
> + */
> +int atags_bad_magic(u32 magic);
> +#endif
> diff --git a/arch/arm/mach-rockchip/Makefile b/arch/arm/mach-rockchip/Makefile
> index 1dc92066bb..4165cbe99f 100644
> --- a/arch/arm/mach-rockchip/Makefile
> +++ b/arch/arm/mach-rockchip/Makefile
> @@ -28,6 +28,7 @@ endif
>
> ifeq ($(CONFIG_TPL_BUILD),)
> obj-$(CONFIG_DISPLAY_CPUINFO) += cpu-info.o
> +obj-$(CONFIG_ROCKCHIP_RK3588) += atags.o
> endif
>
> obj-$(CONFIG_$(SPL_TPL_)RAM) += sdram.o
> diff --git a/arch/arm/mach-rockchip/atags.c b/arch/arm/mach-rockchip/atags.c
> new file mode 100644
> index 0000000000..9daa2f2fc0
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/atags.c
> @@ -0,0 +1,99 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * (C) Copyright 2018 Rockchip Electronics Co., Ltd.
> + *
> + */
> +
> +#include <config.h>
> +#include <asm/io.h>
> +#include <asm/arch-rockchip/atags.h>
> +
> +#define HASH_LEN sizeof(u32)
> +
> +static u32 js_hash(void *buf, u32 len)
> +{
> + u32 i, hash = 0x47C6A7E6;
> + char *data = buf;
> +
> + if (!buf || !len)
> + return hash;
> +
> + for (i = 0; i < len; i++)
> + hash ^= ((hash << 5) + data[i] + (hash >> 2));
> +
> + return hash;
> +}
> +
> +int atags_bad_magic(u32 magic)
> +{
> + bool bad;
> +
> + bad = ((magic != ATAG_CORE) &&
> + (magic != ATAG_NONE) &&
> + (magic < ATAG_SERIAL || magic > ATAG_MAX));
> + if (bad)
> + printf("Magic(%x) is not support\n", magic);
> +
> + return bad;
> +}
> +
> +static int atags_size_overflow(struct tag *t, u32 tag_size)
> +{
> + return (unsigned long)t + (tag_size << 2) - ATAGS_PHYS_BASE > ATAGS_SIZE;
> +}
> +
> +int atags_overflow(struct tag *t)
> +{
> + bool overflow;
> +
> + overflow = atags_size_overflow(t, 0) ||
> + atags_size_overflow(t, t->hdr.size);
> + if (overflow)
> + printf("Tag is overflow\n");
> +
> + return overflow;
> +}
> +
> +int atags_is_available(void)
> +{
> + struct tag *t = (struct tag *)ATAGS_PHYS_BASE;
> +
> + return (t->hdr.magic == ATAG_CORE);
> +}
> +
> +struct tag *atags_get_tag(u32 magic)
> +{
> + u32 *hash, calc_hash, size;
> + struct tag *t;
> +
> + if (!atags_is_available())
> + return NULL;
> +
> + for_each_tag(t, (struct tag *)ATAGS_PHYS_BASE) {
> + if (atags_overflow(t))
> + return NULL;
> +
> + if (atags_bad_magic(t->hdr.magic))
> + return NULL;
> +
> + if (t->hdr.magic != magic)
> + continue;
> +
> + size = t->hdr.size;
> + hash = (u32 *)((ulong)t + (size << 2) - HASH_LEN);
> + if (!*hash) {
> + debug("No hash, magic(%x)\n", magic);
> + return t;
> + }
> + calc_hash = js_hash(t, (size << 2) - HASH_LEN);
> + if (calc_hash == *hash) {
> + debug("Hash okay, magic(%x)\n", magic);
> + return t;
> + }
> + debug("Hash bad, magic(%x), orgHash=%x, nowHash=%x\n",
> + magic, *hash, calc_hash);
> + return NULL;
> + }
> +
> + return NULL;
> +}
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