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Wed, 30 Oct 2024 13:13:47 +0000 Message-ID: Date: Wed, 30 Oct 2024 14:13:43 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 1/1] drivers: bootcount: Add ZynqMP specific bootcount support To: Vasileios Amoiridis , trini@konsulko.com, hs@denx.de, pro@denx.de, sjg@chromium.org Cc: vasileios.amoiridis@cern.ch, u-boot@lists.denx.de References: <20241029185814.7937-1-vassilisamir@gmail.com> <20241029185814.7937-2-vassilisamir@gmail.com> Content-Language: en-US From: Michal Simek Autocrypt: addr=michal.simek@amd.com; keydata= xsFNBFFuvDEBEAC9Amu3nk79+J+4xBOuM5XmDmljuukOc6mKB5bBYOa4SrWJZTjeGRf52VMc howHe8Y9nSbG92obZMqsdt+d/hmRu3fgwRYiiU97YJjUkCN5paHXyBb+3IdrLNGt8I7C9RMy svSoH4WcApYNqvB3rcMtJIna+HUhx8xOk+XCfyKJDnrSuKgx0Svj446qgM5fe7RyFOlGX/wF Ae63Hs0RkFo3I/+hLLJP6kwPnOEo3lkvzm3FMMy0D9VxT9e6Y3afe1UTQuhkg8PbABxhowzj SEnl0ICoqpBqqROV/w1fOlPrm4WSNlZJunYV4gTEustZf8j9FWncn3QzRhnQOSuzTPFbsbH5 WVxwDvgHLRTmBuMw1sqvCc7CofjsD1XM9bP3HOBwCxKaTyOxbPJh3D4AdD1u+cF/lj9Fj255 Es9aATHPvoDQmOzyyRNTQzupN8UtZ+/tB4mhgxWzorpbdItaSXWgdDPDtssJIC+d5+hskys8 B3jbv86lyM+4jh2URpnL1gqOPwnaf1zm/7sqoN3r64cml94q68jfY4lNTwjA/SnaS1DE9XXa XQlkhHgjSLyRjjsMsz+2A4otRLrBbumEUtSMlPfhTi8xUsj9ZfPIUz3fji8vmxZG/Da6jx/c a0UQdFFCL4Ay/EMSoGbQouzhC69OQLWNH3rMQbBvrRbiMJbEZwARAQABzSlNaWNoYWwgU2lt ZWsgKEFNRCkgPG1pY2hhbC5zaW1la0BhbWQuY29tPsLBlAQTAQgAPgIbAwULCQgHAgYVCgkI CwIEFgIDAQIeAQIXgBYhBGc1DJv1zO6bU2Q1ajd8fyH+PR+RBQJkK9VOBQkWf4AXAAoJEDd8 fyH+PR+ROzEP/1IFM7J4Y58SKuvdWDddIvc7JXcal5DpUtMdpuV+ZiHSOgBQRqvwH4CVBK7p ktDCWQAoWCg0KhdGyBjfyVVpm+Gw4DkZovcvMGUlvY5p5w8XxTE5Xx+cj/iDnj83+gy+0Oyz VFU9pew9rnT5YjSRFNOmL2dsorxoT1DWuasDUyitGy9iBegj7vtyAsvEObbGiFcKYSjvurkm MaJ/AwuJehZouKVfWPY/i4UNsDVbQP6iwO8jgPy3pwjt4ztZrl3qs1gV1F4Zrak1k6qoDP5h 19Q5XBVtq4VSS4uLKjofVxrw0J+sHHeTNa3Qgk9nXJEvH2s2JpX82an7U6ccJSdNLYbogQAS BW60bxq6hWEY/afbT+tepEsXepa0y04NjFccFsbECQ4DA3cdA34sFGupUy5h5la/eEf3/8Kd BYcDd+aoxWliMVmL3DudM0Fuj9Hqt7JJAaA0Kt3pwJYwzecl/noK7kFhWiKcJULXEbi3Yf/Y pwCf691kBfrbbP9uDmgm4ZbWIT5WUptt3ziYOWx9SSvaZP5MExlXF4z+/KfZAeJBpZ95Gwm+ FD8WKYjJChMtTfd1VjC4oyFLDUMTvYq77ABkPeKB/WmiAoqMbGx+xQWxW113wZikDy+6WoCS MPXfgMPWpkIUnvTIpF+m1Nyerqf71fiA1W8l0oFmtCF5oTMkzsFNBFFuvDEBEACXqiX5h4IA 03fJOwh+82aQWeHVAEDpjDzK5hSSJZDE55KP8br1FZrgrjvQ9Ma7thSu1mbr+ydeIqoO1/iM fZA+DDPpvo6kscjep11bNhVa0JpHhwnMfHNTSHDMq9OXL9ZZpku/+OXtapISzIH336p4ZUUB 5asad8Ux70g4gmI92eLWBzFFdlyR4g1Vis511Nn481lsDO9LZhKyWelbif7FKKv4p3FRPSbB vEgh71V3NDCPlJJoiHiYaS8IN3uasV/S1+cxVbwz2WcUEZCpeHcY2qsQAEqp4GM7PF2G6gtz IOBUMk7fjku1mzlx4zP7uj87LGJTOAxQUJ1HHlx3Li+xu2oF9Vv101/fsCmptAAUMo7KiJgP Lu8TsP1migoOoSbGUMR0jQpUcKF2L2jaNVS6updvNjbRmFojK2y6A/Bc6WAKhtdv8/e0/Zby iVA7/EN5phZ1GugMJxOLHJ1eqw7DQ5CHcSQ5bOx0Yjmhg4PT6pbW3mB1w+ClAnxhAbyMsfBn XxvvcjWIPnBVlB2Z0YH/gizMDdM0Sa/HIz+q7JR7XkGL4MYeAM15m6O7hkCJcoFV7LMzkNKk OiCZ3E0JYDsMXvmh3S4EVWAG+buA+9beElCmXDcXPI4PinMPqpwmLNcEhPVMQfvAYRqQp2fg 1vTEyK58Ms+0a9L1k5MvvbFg9QARAQABwsF8BBgBCAAmAhsMFiEEZzUMm/XM7ptTZDVqN3x/ If49H5EFAmQr1YsFCRZ/gFoACgkQN3x/If49H5H6BQ//TqDpfCh7Fa5v227mDISwU1VgOPFK eo/+4fF/KNtAtU/VYmBrwT/N6clBxjJYY1i60ekFfAEsCb+vAr1W9geYYpuA+lgR3/BOkHlJ eHf4Ez3D71GnqROIXsObFSFfZWGEgBtHBZ694hKwFmIVCg+lqeMV9nPQKlvfx2n+/lDkspGi epDwFUdfJLHOYxFZMQsFtKJX4fBiY85/U4X2xSp02DxQZj/N2lc9OFrKmFJHXJi9vQCkJdIj S6nuJlvWj/MZKud5QhlfZQsixT9wCeOa6Vgcd4vCzZuptx8gY9FDgb27RQxh/b1ZHalO1h3z kXyouA6Kf54Tv6ab7M/fhNqznnmSvWvQ4EWeh8gddpzHKk8ixw9INBWkGXzqSPOztlJbFiQ3 YPi6o9Pw/IxdQJ9UZ8eCjvIMpXb4q9cZpRLT/BkD4ttpNxma1CUVljkF4DuGydxbQNvJFBK8 ywyA0qgv+Mu+4r/Z2iQzoOgE1SymrNSDyC7u0RzmSnyqaQnZ3uj7OzRkq0fMmMbbrIvQYDS/ y7RkYPOpmElF2pwWI/SXKOgMUgigedGCl1QRUio7iifBmXHkRrTgNT0PWQmeGsWTmfRit2+i l2dpB2lxha72cQ6MTEmL65HaoeANhtfO1se2R9dej57g+urO9V2v/UglZG1wsyaP/vOrgs+3 3i3l5DA= In-Reply-To: <20241029185814.7937-2-vassilisamir@gmail.com> Content-Type: text/plain; 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The Persistent Global Storage Registers of the Platform Management > Unit can keep their value during reboot cycles unless there is a POR reset, making > them appropriate for the bootcount mechanism. > > Signed-off-by: Vasileios Amoiridis > --- > drivers/bootcount/Kconfig | 4 ++++ > drivers/bootcount/Makefile | 1 + > drivers/bootcount/bootcount_zynqmp.c | 28 ++++++++++++++++++++++++++++ > 3 files changed, 33 insertions(+) > create mode 100644 drivers/bootcount/bootcount_zynqmp.c > > diff --git a/drivers/bootcount/Kconfig b/drivers/bootcount/Kconfig > index fa6d8e7128..95b6a9541a 100644 > --- a/drivers/bootcount/Kconfig > +++ b/drivers/bootcount/Kconfig > @@ -82,6 +82,10 @@ config BOOTCOUNT_AT91 > bool "Boot counter for Atmel AT91SAM9XE" > depends on AT91SAM9XE > > +config BOOTCOUNT_ZYNQMP > + bool "Boot counter for Zynq UltraScale+ MPSoC" > + depends on ARCH_ZYNQMP help would help to also described where that count is stored. And why not to have it under DM/U_BOOT_DRIVER? You don't need to create compatible string for it just instantiate it. Look at: U_BOOT_DRVINFO(soc_xilinx_zynqmp) = { .name = "soc_xilinx_zynqmp", }; > + > config DM_BOOTCOUNT > bool "Boot counter in a device-model device" > help > diff --git a/drivers/bootcount/Makefile b/drivers/bootcount/Makefile > index 245f879633..487adc1212 100644 > --- a/drivers/bootcount/Makefile > +++ b/drivers/bootcount/Makefile > @@ -3,6 +3,7 @@ > obj-$(CONFIG_BOOTCOUNT_GENERIC) += bootcount.o > obj-$(CONFIG_BOOTCOUNT_MEM) += bootcount.o > obj-$(CONFIG_BOOTCOUNT_AT91) += bootcount_at91.o > +obj-$(CONFIG_BOOTCOUNT_ZYNQMP) += bootcount_zynqmp.o please put it to the end of CONFIG_BOOTCOUNT to have it at least in correct location > obj-$(CONFIG_BOOTCOUNT_AM33XX) += bootcount_davinci.o > obj-$(CONFIG_BOOTCOUNT_RAM) += bootcount_ram.o > obj-$(CONFIG_BOOTCOUNT_ENV) += bootcount_env.o > diff --git a/drivers/bootcount/bootcount_zynqmp.c b/drivers/bootcount/bootcount_zynqmp.c > new file mode 100644 > index 0000000000..9bb801e188 > --- /dev/null > +++ b/drivers/bootcount/bootcount_zynqmp.c > @@ -0,0 +1,28 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +// SPDX-FileCopyrightText: 2024 CERN (home.cern) > + > +#include > +#include > +#include > + > +#define PMU_PERS_GLOB_GEN_STORAGE0 0x00FFD80050 In arch/arm/mach-zynqmp/include/mach/hardware.h there is already structure defined and gen_storage0 is there too. Please use it. Regarding this location. Exception in PMUFW is using this reg. It means at the end of day it is up to you if you want to use it or not. > + > +void bootcount_store(ulong a) > +{ > + int ret; > + > + ret = zynqmp_mmio_write(PMU_PERS_GLOB_GEN_STORAGE0, 0xFF, a); > + if (ret) > + printf("Failed: mmio write\n"); > +} > + > +ulong bootcount_load(void) > +{ > + int ret; > + u32 val; as was said val should be initialized here too. > + > + ret = zynqmp_mmio_read(PMU_PERS_GLOB_GEN_STORAGE0, &val); > + if (ret) > + printf("Failed: mmio read\n"); > + return val; > +} Anyway I expect this driver to be under DM that v2 will change. Thanks, Michal