X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Farch%2Farm%2Finclude%2Fasm%2Fmacro.h;fp=qemu%2Froms%2Fu-boot%2Farch%2Farm%2Finclude%2Fasm%2Fmacro.h;h=f77e4b880e48c4cba5f71d28da434e0f1e42293e;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/u-boot/arch/arm/include/asm/macro.h b/qemu/roms/u-boot/arch/arm/include/asm/macro.h new file mode 100644 index 000000000..f77e4b880 --- /dev/null +++ b/qemu/roms/u-boot/arch/arm/include/asm/macro.h @@ -0,0 +1,111 @@ +/* + * include/asm-arm/macro.h + * + * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ASM_ARM_MACRO_H__ +#define __ASM_ARM_MACRO_H__ +#ifdef __ASSEMBLY__ + +/* + * These macros provide a convenient way to write 8, 16 and 32 bit data + * to any address. + * Registers r4 and r5 are used, any data in these registers are + * overwritten by the macros. + * The macros are valid for any ARM architecture, they do not implement + * any memory barriers so caution is recommended when using these when the + * caches are enabled or on a multi-core system. + */ + +.macro write32, addr, data + ldr r4, =\addr + ldr r5, =\data + str r5, [r4] +.endm + +.macro write16, addr, data + ldr r4, =\addr + ldrh r5, =\data + strh r5, [r4] +.endm + +.macro write8, addr, data + ldr r4, =\addr + ldrb r5, =\data + strb r5, [r4] +.endm + +/* + * This macro generates a loop that can be used for delays in the code. + * Register r4 is used, any data in this register is overwritten by the + * macro. + * The macro is valid for any ARM architeture. The actual time spent in the + * loop will vary from CPU to CPU though. + */ + +.macro wait_timer, time + ldr r4, =\time +1: + nop + subs r4, r4, #1 + bcs 1b +.endm + +#ifdef CONFIG_ARM64 +/* + * Register aliases. + */ +lr .req x30 + +/* + * Branch according to exception level + */ +.macro switch_el, xreg, el3_label, el2_label, el1_label + mrs \xreg, CurrentEL + cmp \xreg, 0xc + b.eq \el3_label + cmp \xreg, 0x8 + b.eq \el2_label + cmp \xreg, 0x4 + b.eq \el1_label +.endm + +/* + * Branch if current processor is a slave, + * choose processor with all zero affinity value as the master. + */ +.macro branch_if_slave, xreg, slave_label + mrs \xreg, mpidr_el1 + tst \xreg, #0xff /* Test Affinity 0 */ + b.ne \slave_label + lsr \xreg, \xreg, #8 + tst \xreg, #0xff /* Test Affinity 1 */ + b.ne \slave_label + lsr \xreg, \xreg, #8 + tst \xreg, #0xff /* Test Affinity 2 */ + b.ne \slave_label + lsr \xreg, \xreg, #16 + tst \xreg, #0xff /* Test Affinity 3 */ + b.ne \slave_label +.endm + +/* + * Branch if current processor is a master, + * choose processor with all zero affinity value as the master. + */ +.macro branch_if_master, xreg1, xreg2, master_label + mrs \xreg1, mpidr_el1 + lsr \xreg2, \xreg1, #32 + lsl \xreg1, \xreg1, #40 + lsr \xreg1, \xreg1, #40 + orr \xreg1, \xreg1, \xreg2 + cbz \xreg1, \master_label +.endm + +#endif /* CONFIG_ARM64 */ + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_ARM_MACRO_H__ */