| 0a2d5b43 | 02-Feb-2018 |
Masahiro Yamada <yamada.masahiro@socionext.com> |
types: use int-ll64 for both aarch32 and aarch64
Since commit 031dbb122472 ("AArch32: Add essential Arch helpers"), it is difficult to use consistent format strings for printf() family between aarch
types: use int-ll64 for both aarch32 and aarch64
Since commit 031dbb122472 ("AArch32: Add essential Arch helpers"), it is difficult to use consistent format strings for printf() family between aarch32 and aarch64.
For example, uint64_t is defined as 'unsigned long long' for aarch32 and as 'unsigned long' for aarch64. Likewise, uintptr_t is defined as 'unsigned int' for aarch32, and as 'unsigned long' for aarch64.
A problem typically arises when you use printf() in common code.
One solution could be, to cast the arguments to a type long enough for both architectures. For example, if 'val' is uint64_t type, like this:
printf("val = %llx\n", (unsigned long long)val);
Or, somebody may suggest to use a macro provided by <inttypes.h>, like this:
printf("val = %" PRIx64 "\n", val);
But, both would make the code ugly.
The solution adopted in Linux kernel is to use the same typedefs for all architectures. The fixed integer types in the kernel-space have been unified into int-ll64, like follows:
typedef signed char int8_t; typedef unsigned char uint8_t;
typedef signed short int16_t; typedef unsigned short uint16_t;
typedef signed int int32_t; typedef unsigned int uint32_t;
typedef signed long long int64_t; typedef unsigned long long uint64_t;
[ Linux commit: 0c79a8e29b5fcbcbfd611daf9d500cfad8370fcf ]
This gets along with the codebase shared between 32 bit and 64 bit, with the data model called ILP32, LP64, respectively.
The width for primitive types is defined as follows:
ILP32 LP64 int 32 32 long 32 64 long long 64 64 pointer 32 64
'long long' is 64 bit for both, so it is used for defining uint64_t. 'long' has the same width as pointer, so for uintptr_t.
We still need an ifdef conditional for (s)size_t.
All 64 bit architectures use "unsigned long" size_t, and most 32 bit architectures use "unsigned int" size_t. H8/300, S/390 are known as exceptions; they use "unsigned long" size_t despite their architecture is 32 bit.
One idea for simplification might be to define size_t as 'unsigned long' across architectures, then forbid the use of "%z" string format. However, this would cause a distortion between size_t and sizeof() operator. We have unknowledge about the native type of sizeof(), so we need a guess of it anyway. I want the following formula to always return 1:
__builtin_types_compatible_p(size_t, typeof(sizeof(int)))
Fortunately, ARM is probably a majority case. As far as I know, all 32 bit ARM compilers use "unsigned int" size_t.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
show more ...
|
| 890abc33 | 02-Aug-2017 |
Julius Werner <jwerner@chromium.org> |
rockchip: Move to MULTI_CONSOLE_API
This patch changes all Rockchip platforms to use the new MULTI_CONSOLE_API. The platform-specific plat_crash_console implementations are removed so that the platf
rockchip: Move to MULTI_CONSOLE_API
This patch changes all Rockchip platforms to use the new MULTI_CONSOLE_API. The platform-specific plat_crash_console implementations are removed so that the platform can use the ones from the common platform code instead.
Also change the registers used in plat_crash_print_regs. The existing use of x16 and x17 has always been illegal, since those registers are reserved for use by the linker as a temporary scratch registers in intra-procedure-call veneers and can never be expected to maintain their values across a function call.
Change-Id: I8249424150be8d5543ed4af93b56756795a5288f Signed-off-by: Julius Werner <jwerner@chromium.org>
show more ...
|
| 2adcad64 | 18-May-2017 |
Lin Huang <hl@rock-chips.com> |
rockchip/rk3399: save and restore pd_alive register
pd_alive control cru, grf, timer, gpio and wdt, when turn off logic power rail, these register value will back to reset value, we need to save the
rockchip/rk3399: save and restore pd_alive register
pd_alive control cru, grf, timer, gpio and wdt, when turn off logic power rail, these register value will back to reset value, we need to save them value in suspend and restore them when resuem, since timer will reinitial in kernel, so it not need to save/restore.
Change-Id: I0fc2a011d3cdc04b66ffbf728e769eb28b51ee38 Signed-off-by: Lin Huang <hl@rock-chips.com>
show more ...
|
| 84597b57 | 12-May-2017 |
Lin Huang <hl@rock-chips.com> |
rockchip: check wakeup cpu when resume
unlike rk3399 and rk3368, there are some rockchip 64bit SOC do not have CPUPD, and pmu_cpuson_entrypoint() is common function for rockchip platform, so we need
rockchip: check wakeup cpu when resume
unlike rk3399 and rk3368, there are some rockchip 64bit SOC do not have CPUPD, and pmu_cpuson_entrypoint() is common function for rockchip platform, so we need to check wakeup cpu when resume.
Change-Id: I6313e8a9d7c16b03e033414f0cb281646c2159ff Signed-off-by: Lin Huang <hl@rock-chips.com>
show more ...
|
| 4e836d35 | 16-May-2017 |
Lin Huang <hl@rock-chips.com> |
rockchip/rk3399: enable PMU_PERILP_PD_EN bit when suspend
with PMU_PERILP_PD_EN bit enable, the soc will shutdown cm0, crypto, dcf, imem(normal SRAM), dmac, bootrom, efuse_con, spi, i2c, uart, sarad
rockchip/rk3399: enable PMU_PERILP_PD_EN bit when suspend
with PMU_PERILP_PD_EN bit enable, the soc will shutdown cm0, crypto, dcf, imem(normal SRAM), dmac, bootrom, efuse_con, spi, i2c, uart, saradc, tsadc when suspend, we have M0 code need to run when suspend in normal SRAM, so we need to take care of that.
Change-Id: I8c066637e5b81d4b1d53197450b9d592cbe00793 Signed-off-by: Lin Huang <hl@rock-chips.com> Signed-off-by: Derek Basehore <dbasehore@chromium.org> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
show more ...
|