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Marek Behún 86c5e21013 ARM: make gd a function call for LTO and set via set_gd() 
On ARM, the gd pointer is stored in registers r9 / x18. For this the
-ffixed-r9 / -ffixed-x18 flag is used when compiling, but using global
register variables causes errors when building with LTO, and these
errors are very difficult to overcome.

Richard Biener says [1]:
  Note that global register vars shouldn't be used with LTO and if they
  are restricted to just a few compilation units the recommended fix is
  to build those CUs without -flto.

We cannot do this for U-Boot since all CUs use -ffixed-reg flag.

It seems that with LTO we could in fact store the gd pointer differently
and gain performance or size benefit by allowing the compiler to use
r9 / x18. But this would need more work.

So for now, when building with LTO, go the clang way, and instead of
declaring gd a global register variable, we make it a function call via
macro.

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68384

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>
 		2021-05-24 14:21:30 -04:00
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arch-am33xx arm: ti: am33xx: add DPLL_EN_FAST_RELOCK_BYPASS macro 2021-01-12 10:58:04 +05:30
arch-armada8k
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arch-armada100
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arch-armv7
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arch-aspeed aspeed: Add AST2600 platform support 2021-01-18 15:23:06 -05:00
arch-bcm235xx
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arch-bcm281xx
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arch-bcmcygnus Convert CONFIG_PHYLIB et al to Kconfig 2020-04-28 15:57:58 -04:00
arch-bcmns3 board: ns3: add api to save boot parameters passed from BL31 2020-07-29 10:13:41 -04:00
arch-bcmnsp
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arch-ep93xx
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arch-fsl-layerscape configs: fsl: move bootrom specific defines to Kconfig 2021-03-05 10:25:41 +05:30
arch-hi3660 common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
arch-hi3798cv200
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arch-hi6220 dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
arch-imx mx6dq: hab: Fix chip version in hab.h code 2021-04-08 09:18:29 +02:00
arch-imx8 imx8: Add DEK blob encapsulation 2021-04-08 20:29:52 +02:00
arch-imx8m iMX8M: Add support to enable CONFIG_IMX_HAB 2021-04-08 09:18:29 +02:00
arch-imxrt video: mxsfb: add support for i.MXRT 2020-04-18 12:54:43 +02:00
arch-lpc32xx dm: i2c: use CONFIG_IS_ENABLED macro for DM_I2C/DM_I2C_GPIO 2021-02-21 06:08:00 +01:00
arch-ls102xa gpio: mpc8xxx_gpio: Fix for litte endian 2021-02-08 14:01:19 +05:30
arch-mediatek mediatek: Drop dm.h header file 2020-08-03 22:19:54 -04:00
arch-meson arm: meson: remove static ethernet link setup 2021-04-06 11:10:29 +02:00
arch-mvebu
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arch-mx5 spi: imx: Define register bits in the driver 2021-01-23 13:40:29 +01:00
arch-mx6 imx: imx6ull: fix pinmux sel_input value for uart5 pins 2021-04-08 23:59:50 +02:00
arch-mx7 spi: imx: Define register bits in the driver 2021-01-23 13:40:29 +01:00
arch-mx7ulp caam: enable support for iMX7ULP 2021-04-08 09:18:29 +02:00
arch-mx25 spi: imx: Define register bits in the driver 2021-01-23 13:40:29 +01:00
arch-mx27 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
arch-mx31 spi: imx: Define register bits in the driver 2021-01-23 13:40:29 +01:00
arch-mx35 spi: imx: Define register bits in the driver 2021-01-23 13:40:29 +01:00
arch-mxs treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
arch-octeontx arm: octeontx: Add headers for OcteonTX 2020-08-25 08:01:16 +02:00
arch-octeontx2 arm: octeontx2: Add headers for OcteonTX2 2020-08-25 08:01:16 +02:00
arch-omap3
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arch-omap4 arm: Don't include common.h in header files 2020-05-18 14:54:24 -04:00
arch-omap5 arm: Don't include common.h in header files 2020-05-18 14:54:24 -04:00
arch-orion5x
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arch-owl net: designware: s700: Add glue code for S700 mac 2020-07-07 17:11:58 -04:00
arch-px30
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arch-pxa
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arch-rk322x
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arch-rk3036
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arch-rk3128
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arch-rk3188
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arch-rk3288
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arch-rk3308 arm: Don't include common.h in header files 2020-05-18 14:54:24 -04:00
arch-rk3328
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arch-rk3368
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arch-rk3399
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arch-rockchip Rockchip: video: edp: Change interrupt polarity configuration 2021-04-10 11:52:43 +02:00
arch-rv1108
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arch-sa1100
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arch-spear
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arch-stih410 treewide: Update email address Patrick Delaunay and Patrice Chotard 2020-12-09 10:57:50 +01:00
arch-stm32 treewide: Update email address Patrick Delaunay and Patrice Chotard 2020-12-09 10:57:50 +01:00
arch-stm32f4 treewide: Update email address Patrick Delaunay and Patrice Chotard 2020-12-09 10:57:50 +01:00
arch-stm32f7 treewide: Update email address Patrick Delaunay and Patrice Chotard 2020-12-09 10:57:50 +01:00
arch-stm32h7 treewide: Update email address Patrick Delaunay and Patrice Chotard 2020-12-09 10:57:50 +01:00
arch-stv0991
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arch-sunxi sunxi: support asymmetric dual rank DRAM on A64/R40 2021-04-16 01:12:58 +01:00
arch-tegra common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
arch-tegra20
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arch-tegra30
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arch-tegra114
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arch-tegra124 common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
arch-tegra186
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arch-tegra210
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arch-vf610 dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
armv8 common: Move hang() to the same header as panic() 2020-01-17 17:53:40 -05:00
iproc-common configs: migrate CONFIG_SYS_ARM_CACHE_* in Kconfig 2020-05-01 11:34:01 -04:00
kona-common
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mach-imx mx6dq: hab: Fix chip version in hab.h code 2021-04-08 09:18:29 +02:00
proc-armv
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ti-common common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
xen Revert "arch: arm/xen: add putc() for debugging" 2020-10-23 09:16:07 -04:00
acpi_table.h acpi: Add missing ARM acpi_table header 2021-01-18 15:14:15 -05:00
armv7.h
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armv7_mpu.h common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
armv7m.h
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assembler.h
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atomic.h
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barriers.h
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bitops.h common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
boot0-linux-kernel-header.h
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bootm.h
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byteorder.h
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cache.h arm: cp15: remove weak function arm_init_domains 2021-03-02 15:53:37 -05:00
config.h lmb: move CONFIG_LMB in Kconfig 2021-04-22 14:09:45 -04:00
davinci_rtc.h
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dma-mapping.h arm: Don't include common.h in header files 2020-05-18 14:54:24 -04:00
ehci-omap.h usb: ehci-omap: Add Support for DM_USB and OF_CONTROL 2020-05-22 15:22:35 +02:00
emif.h arm: Don't include common.h in header files 2020-05-18 14:54:24 -04:00
fsl_secure_boot.h
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gic-v3.h arch: arm: use dt and UCLASS_SYSCON to get gic lpi details 2020-07-29 10:37:11 -04:00
gic.h
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global_data.h ARM: make gd a function call for LTO and set via set_gd() 2021-05-24 14:21:30 -04:00
gpio.h gpio: do not include <asm/arch/gpio.h> on ARCH_QEMU 2021-01-18 15:14:15 -05:00
handoff.h arm: Add arm handoff header file 2020-01-24 11:19:52 -05:00
hardware.h
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io.h arm: include/asm/io.h: Add 64bit clrbits and setbits helpers 2020-08-25 08:01:16 +02:00
linkage.h
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mach-types.h
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macro.h
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memory.h
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mmu.h arm: provide a function for boards init code to modify MMU virtual-physical map 2020-07-10 14:10:43 -04:00
omap_common.h arm: Don't include common.h in header files 2020-05-18 14:54:24 -04:00
omap_gpio.h dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
omap_i2c.h dm: i2c: use CONFIG_IS_ENABLED macro for DM_I2C/DM_I2C_GPIO 2021-02-21 06:08:00 +01:00
omap_mmc.h common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
omap_musb.h dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
omap_sec_common.h arm: Don't include common.h in header files 2020-05-18 14:54:24 -04:00
opcodes-sec.h
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opcodes-virt.h
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opcodes.h
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pl310.h
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posix_types.h
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processor.h
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psci.h common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
ptrace.h
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sections.h
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secure.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2021-05-24 14:21:30 -04:00
setjmp.h
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setup.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2021-05-24 14:21:30 -04:00
spin_table.h
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spl.h
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string.h
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system.h arm: remove set_dacr/get_dacr functions 2021-03-02 15:53:37 -05:00
types.h
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u-boot-arm.h common: Move reset_misc() function to arch header 2020-01-17 13:27:30 -05:00
u-boot.h
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unaligned.h
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unified.h
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utils.h
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xen.h board: Introduce xenguest_arm64 board 2020-08-14 15:18:27 -04:00