From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Dooks Date: Thu, 19 Oct 2017 11:45:07 +0100 Subject: [U-Boot] [RFC PATCH u-boot] ARM: arch-meson: build memory banks using reported memory from registers In-Reply-To: <1508403892-22578-1-git-send-email-narmstrong@baylibre.com> References: <1508403892-22578-1-git-send-email-narmstrong@baylibre.com> Message-ID: <9b4348badf34883c6262fd6f1c87e584@codethink.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 2017-10-19 10:04, Neil Armstrong wrote: > As discussed at [1], the Amlogic Meson GX SoCs can embed a BL31 > firmware > and a secondary BL32 firmware. > Since mid-2017, the reserved memory address of the BL31 firmware was > moved > and grown for security reasons. > > But mainline U-boot and Linux has the old address and size fixed. > > These SoCs have a register interface to get the two firmware reserved > memory start and sizes. > > This patch adds a dynamic memory bank redistribution according to the > values in the firmware. > > Note that the memory address ordering between BL31 and BL32 is not > etablished, > so it must be determined dynamically. > > [1] > http://lists.infradead.org/pipermail/linux-amlogic/2017-October/004860.html > > Signed-off-by: Neil Armstrong > --- > arch/arm/include/asm/arch-meson/gxbb.h | 15 ++++++ > arch/arm/mach-meson/board.c | 99 > +++++++++++++++++++++++++++++++--- > include/configs/meson-gxbb-common.h | 2 +- > 3 files changed, 109 insertions(+), 7 deletions(-) > > diff --git a/arch/arm/include/asm/arch-meson/gxbb.h > b/arch/arm/include/asm/arch-meson/gxbb.h > index 74d5290..57db37e 100644 > --- a/arch/arm/include/asm/arch-meson/gxbb.h > +++ b/arch/arm/include/asm/arch-meson/gxbb.h > @@ -7,10 +7,25 @@ > #ifndef __GXBB_H__ > #define __GXBB_H__ > > +#define GXBB_AOBUS_BASE 0xc8100000 > #define GXBB_PERIPHS_BASE 0xc8834400 > #define GXBB_HIU_BASE 0xc883c000 > #define GXBB_ETH_BASE 0xc9410000 > > +/* Always-On Peripherals registers */ > +#define GXBB_AO_ADDR(off) (GXBB_AOBUS_BASE + ((off) << 2)) > + > +#define GXBB_AO_SEC_GP_CFG0 GXBB_AO_ADDR(0x90) > +#define GXBB_AO_SEC_GP_CFG3 GXBB_AO_ADDR(0x93) > +#define GXBB_AO_SEC_GP_CFG4 GXBB_AO_ADDR(0x94) > +#define GXBB_AO_SEC_GP_CFG5 GXBB_AO_ADDR(0x95) > + > +#define GXBB_AO_MEM_SIZE_MASK 0xFFFF0000 > +#define GXBB_AO_MEM_SIZE_SHIFT 16 > +#define GXBB_AO_BL31_RSVMEM_SIZE_MASK 0xFFFF0000 > +#define GXBB_AO_BL31_RSVMEM_SIZE_SHIFT 16 > +#define GXBB_AO_BL32_RSVMEM_SIZE_MASK 0xFFFF > + > /* Peripherals registers */ > #define GXBB_PERIPHS_ADDR(off) (GXBB_PERIPHS_BASE + ((off) << 2)) > > diff --git a/arch/arm/mach-meson/board.c b/arch/arm/mach-meson/board.c > index e89c6aa..bd330af 100644 > --- a/arch/arm/mach-meson/board.c > +++ b/arch/arm/mach-meson/board.c > @@ -11,6 +11,8 @@ > #include > #include > #include > +#include > +#include > > DECLARE_GLOBAL_DATA_PTR; > > @@ -34,14 +36,99 @@ int dram_init(void) > return 0; > } > > +phys_size_t get_effective_memsize(void) > +{ > + /* Size is reported in MiB, convert it in bytes */ > + return ((in_le32(GXBB_AO_SEC_GP_CFG0) & GXBB_AO_MEM_SIZE_MASK) > + >> GXBB_AO_MEM_SIZE_SHIFT) * SZ_1M; Is in_le32 suitable here? > +} > + > int dram_init_banksize(void) > { > - /* Reserve first 16 MiB of RAM for firmware */ > - gd->bd->bi_dram[0].start = 0x1000000; > - gd->bd->bi_dram[0].size = 0xf000000; > - /* Reserve 2 MiB for ARM Trusted Firmware (BL31) */ > - gd->bd->bi_dram[1].start = 0x10000000; > - gd->bd->bi_dram[1].size = gd->ram_size - 0x10200000; > + u32 bl31_size, bl31_start; > + u32 bl32_size, bl32_start; > + /* Start after first 16MiB reserved zone */ > + unsigned int next = 0; > + u32 last = 0x1000000; > + u32 reg; > + > + /* > + * Get ARM Trusted Firmware reserved memory zones in : > + * - AO_SEC_GP_CFG3: bl32 & bl31 size in KiB, can be 0 > + * - AO_SEC_GP_CFG5: bl31 physical start address, can be NULL > + * - AO_SEC_GP_CFG4: bl32 physical start address, can be NULL > + */ Can you use bootmem reserve to do this? > + > + reg = in_le32(GXBB_AO_SEC_GP_CFG3); > + > + bl31_size = ((reg & GXBB_AO_BL31_RSVMEM_SIZE_MASK) > + >> GXBB_AO_BL31_RSVMEM_SIZE_SHIFT) * SZ_1K; > + bl32_size = (reg & GXBB_AO_BL32_RSVMEM_SIZE_MASK) * SZ_1K; > + > + bl31_start = in_le32(GXBB_AO_SEC_GP_CFG5); > + bl32_start = in_le32(GXBB_AO_SEC_GP_CFG4); > + > + if (bl31_size && bl31_start && bl32_size && bl32_start) { > + /* Reserve memory for ARM Trusted Firmware (BL31 && BL32) */ > + gd->bd->bi_dram[next].start = last; > + if (bl31_start > bl32_start) > + gd->bd->bi_dram[next].size = bl32_start - last; > + else > + gd->bd->bi_dram[next].size = bl31_start - last; > + > + last = gd->bd->bi_dram[next].start + > + gd->bd->bi_dram[next].size; > + > + if (bl31_start > bl32_start) > + last += bl32_size; > + else > + last += bl31_size; > + next++; > + > + gd->bd->bi_dram[next].start = last; > + if (bl31_start > bl32_start) > + gd->bd->bi_dram[next].size = bl31_start - last; > + else > + gd->bd->bi_dram[next].size = bl32_start - last; > + > + last = gd->bd->bi_dram[next].start + > + gd->bd->bi_dram[next].size; > + > + if (bl31_start > bl32_start) > + last += bl31_size; > + else > + last += bl32_size; > + next++; > + } else if ((bl31_size && bl31_start) || (bl32_size && bl32_start)) { > + /* Reserve memory for ARM Trusted Firmware (BL31 || BL32) */ > + gd->bd->bi_dram[next].start = last; > + if (bl31_start && bl31_size) > + gd->bd->bi_dram[next].size = bl31_start - last; > + else > + gd->bd->bi_dram[next].size = bl32_start - last; > + > + last = gd->bd->bi_dram[next].start + > + gd->bd->bi_dram[next].size; > + > + if (bl31_start && bl31_size) > + last += bl31_size; > + else > + last += bl32_size; > + > + next++; > + } > + > + /* Add remaining memory */ > + gd->bd->bi_dram[next].start = last; > + gd->bd->bi_dram[next].size = get_effective_memsize() - last; > + next++; > + > + /* Reset unused banks */ > + for ( ; next < CONFIG_NR_DRAM_BANKS ; ++next) { > + gd->bd->bi_dram[next].start = 0; > + gd->bd->bi_dram[next].size = 0; > + } > + > return 0; > } > > diff --git a/include/configs/meson-gxbb-common.h > b/include/configs/meson-gxbb-common.h > index d88d42d..e70fccd 100644 > --- a/include/configs/meson-gxbb-common.h > +++ b/include/configs/meson-gxbb-common.h > @@ -10,7 +10,7 @@ > > #define CONFIG_CPU_ARMV8 > #define CONFIG_REMAKE_ELF > -#define CONFIG_NR_DRAM_BANKS 2 > +#define CONFIG_NR_DRAM_BANKS 3 > #define CONFIG_ENV_SIZE 0x2000 > #define CONFIG_SYS_MAXARGS 32 > #define CONFIG_SYS_MALLOC_LEN (32 << 20)