u-boot/arch/arm/include/asm/global_data.h

/*
 * (C) Copyright 2002-2010
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef	__ASM_GBL_DATA_H
#define __ASM_GBL_DATA_H

#ifdef CONFIG_OMAP
#include <asm/omap_boot.h>
#endif

/* Architecture-specific global data */
struct arch_global_data {
#if defined(CONFIG_FSL_ESDHC)
	u32 sdhc_clk;
#endif
#ifdef CONFIG_AT91FAMILY
	/* "static data" needed by at91's clock.c */
	unsigned long	cpu_clk_rate_hz;
	unsigned long	main_clk_rate_hz;
	unsigned long	mck_rate_hz;
	unsigned long	plla_rate_hz;
	unsigned long	pllb_rate_hz;
	unsigned long	at91_pllb_usb_init;
#endif
	/* "static data" needed by most of timer.c on ARM platforms */
	unsigned long timer_rate_hz;
	unsigned long tbu;
	unsigned long tbl;
	unsigned long lastinc;
	unsigned long long timer_reset_value;
#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
	unsigned long tlb_addr;
	unsigned long tlb_size;
#endif

#ifdef CONFIG_OMAP
	struct omap_boot_parameters omap_boot_params;
#endif
};

#include <asm-generic/global_data.h>

#ifdef __clang__

#define DECLARE_GLOBAL_DATA_PTR
#define gd	get_gd()

static inline gd_t *get_gd(void)
{
	gd_t *gd_ptr;

#ifdef CONFIG_ARM64
	/*
	 * Make will already error that reserving x18 is not supported at the
	 * time of writing, clang: error: unknown argument: '-ffixed-x18'
	 */
	__asm__ volatile("mov %0, x18\n" : "=r" (gd_ptr));
#else
	__asm__ volatile("mov %0, r9\n" : "=r" (gd_ptr));
#endif

	return gd_ptr;
}

#else

#ifdef CONFIG_ARM64
#define DECLARE_GLOBAL_DATA_PTR		register volatile gd_t *gd asm ("x18")
#else
#define DECLARE_GLOBAL_DATA_PTR		register volatile gd_t *gd asm ("r9")
#endif
#endif

#endif /* __ASM_GBL_DATA_H */
Initial revision 22 years ago			`/*`
Make getenv() work before relocation. So far, getenv() would work before relocation is most cases, even though it was not intended to be used that way. When switching to a hash table based implementation, this would break a number of boards. For convenience, we make getenv() check if it's running before relocation and, if so, use getenv_f() internally. Note that this is limited to simple cases, as we use a small static buffer (32 bytes) in the global data for this purpose. For this reason, it is also not a good idea to convert all current uses of getenv_f() into getenv() - some of the existing use cases need to be able to deal with longer variable values, so getenv_f() is still needed and recommended for use before relocation. Signed-off-by: Wolfgang Denk <wd@denx.de> 15 years ago			`* (C) Copyright 2002-2010`
Initial revision 22 years ago			`* Wolfgang Denk, DENX Software Engineering, wd@denx.de.`
			`*`
Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com> 12 years ago			`* SPDX-License-Identifier: GPL-2.0+`
Initial revision 22 years ago			`*/`

			`#ifndef __ASM_GBL_DATA_H`
			`#define __ASM_GBL_DATA_H`
Add architecture-specific global data We plan to move architecture-specific data into a separate structure so that we can make the rest of it common. As a first step, create struct arch_global_data to hold these fields. Initially it is empty. This patch applies to all archs at once. I can split it if this is really a pain. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago
ARM: OMAP: Correct save_boot_params and replace with 'C' function Currently save_boot_params saves the boot parameters passed from romcode. But this is not stored in a writable location consistently. So the current code would not work for a 'XIP' boot. Change this by saving the boot parameters in 'gd' which is always writable. Also add a 'C' function instead of an assembly code that is more readable. Signed-off-by: Sricharan R <r.sricharan@ti.com> 12 years ago			`#ifdef CONFIG_OMAP`
			`#include <asm/omap_boot.h>`
			`#endif`

Add architecture-specific global data We plan to move architecture-specific data into a separate structure so that we can make the rest of it common. As a first step, create struct arch_global_data to hold these fields. Initially it is empty. This patch applies to all archs at once. I can split it if this is really a pain. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`/* Architecture-specific global data */`
			`struct arch_global_data {`
ppc: arm: Move sdhc_clk into arch_global_data This is used by both powerpc and arm, but I think it still qualifies as architecture-specific. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`#if defined(CONFIG_FSL_ESDHC)`
			`u32 sdhc_clk;`
			`#endif`
at91: Move at91 global data into arch_global_data Move these fields into arch_global_data. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`#ifdef CONFIG_AT91FAMILY`
			`/* "static data" needed by at91's clock.c */`
			`unsigned long cpu_clk_rate_hz;`
			`unsigned long main_clk_rate_hz;`
			`unsigned long mck_rate_hz;`
			`unsigned long plla_rate_hz;`
			`unsigned long pllb_rate_hz;`
			`unsigned long at91_pllb_usb_init;`
			`#endif`
arm: Move timer_rate_hz into arch_global_data Move this field into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`/* "static data" needed by most of timer.c on ARM platforms */`
			`unsigned long timer_rate_hz;`
arm: Move tbu to arch_global_data Move this field into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`unsigned long tbu;`
arm: Move tbl to arch_global_data Move this field into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`unsigned long tbl;`
arm: Move lastinc to arch_global_data Move this field into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`unsigned long lastinc;`
arm: Move timer_reset_value to arch_global_data Move this field into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`unsigned long long timer_reset_value;`
arm: Move tlb_addr and tlb_size to arch_global_data Move these fields into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> [trini: Address tlb_size in this patch as well] Signed-off-by: Tom Rini <trini@ti.com> 12 years ago			`#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))`
			`unsigned long tlb_addr;`
			`unsigned long tlb_size;`
			`#endif`
ARM: OMAP: Correct save_boot_params and replace with 'C' function Currently save_boot_params saves the boot parameters passed from romcode. But this is not stored in a writable location consistently. So the current code would not work for a 'XIP' boot. Change this by saving the boot parameters in 'gd' which is always writable. Also add a 'C' function instead of an assembly code that is more readable. Signed-off-by: Sricharan R <r.sricharan@ti.com> 12 years ago
			`#ifdef CONFIG_OMAP`
			`struct omap_boot_parameters omap_boot_params;`
			`#endif`
Add architecture-specific global data We plan to move architecture-specific data into a separate structure so that we can make the rest of it common. As a first step, create struct arch_global_data to hold these fields. Initially it is empty. This patch applies to all archs at once. I can split it if this is really a pain. Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`};`

arm: Use generic global_data Signed-off-by: Simon Glass <sjg@chromium.org> 12 years ago			`#include <asm-generic/global_data.h>`
Initial revision 22 years ago
ARM: make gd a function for clang "clang does not support global register variables; this is unlikely to be implemented soon because it requires additional LLVM backend support" [1] Workaround it by obtaining the value of gd/r9 by an inline asm routine. Note there is no set routine added for ARM at the moment, since most if not all updates of gd from c are actually not needed for ARM. [1] http://clang.llvm.org/docs/UsersManual.html cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl> 11 years ago			`#ifdef __clang__`

			`#define DECLARE_GLOBAL_DATA_PTR`
			`#define gd get_gd()`

			`static inline gd_t *get_gd(void)`
			`{`
			`gd_t *gd_ptr;`

			`#ifdef CONFIG_ARM64`
			`/*`
			`* Make will already error that reserving x18 is not supported at the`
			`* time of writing, clang: error: unknown argument: '-ffixed-x18'`
			`*/`
			`__asm__ volatile("mov %0, x18\n" : "=r" (gd_ptr));`
			`#else`
			`__asm__ volatile("mov %0, r9\n" : "=r" (gd_ptr));`
			`#endif`

			`return gd_ptr;`
			`}`

			`#else`

arm64: core support Relocation code based on a patch by Scott Wood, which is: Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Feng <fenghua@phytium.com.cn> 11 years ago			`#ifdef CONFIG_ARM64`
			`#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("x18")`
			`#else`
			`#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r9")`
			`#endif`
ARM: make gd a function for clang "clang does not support global register variables; this is unlikely to be implemented soon because it requires additional LLVM backend support" [1] Workaround it by obtaining the value of gd/r9 by an inline asm routine. Note there is no set routine added for ARM at the moment, since most if not all updates of gd from c are actually not needed for ARM. [1] http://clang.llvm.org/docs/UsersManual.html cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl> 11 years ago			`#endif`
Initial revision 22 years ago
			`#endif /* __ASM_GBL_DATA_H */`