| Wu Zhangjin | 28c945c | 2010-06-01 18:29:04 +0800 | [diff] [blame] | 1 | # |
| 2 | # Loongson Processors' Support |
| 3 | # |
| 4 | |
| 5 | # Only gcc >= 4.4 have Loongson specific support |
| 6 | cflags-$(CONFIG_CPU_LOONGSON2) += -Wa,--trap |
| 7 | cflags-$(CONFIG_CPU_LOONGSON2E) += \ |
| 8 | $(call cc-option,-march=loongson2e,-march=r4600) |
| 9 | cflags-$(CONFIG_CPU_LOONGSON2F) += \ |
| 10 | $(call cc-option,-march=loongson2f,-march=r4600) |
| 11 | # Enable the workarounds for Loongson2f |
| 12 | ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS |
| 13 | ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-nop,),) |
| 14 | $(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-nop) |
| 15 | else |
| 16 | cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-nop |
| 17 | endif |
| 18 | ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-jump,),) |
| 19 | $(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-jump) |
| 20 | else |
| 21 | cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-jump |
| 22 | endif |
| 23 | endif |
| 24 | |
| Huacai Chen | 5188129 | 2016-01-21 21:09:48 +0800 | [diff] [blame] | 25 | cflags-$(CONFIG_CPU_LOONGSON3) += -Wa,--trap |
| 26 | # |
| 27 | # binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a |
| 28 | # as MIPS64 R2; older versions as just R1. This leaves the possibility open |
| 29 | # that GCC might generate R2 code for -march=loongson3a which then is rejected |
| 30 | # by GAS. The cc-option can't probe for this behaviour so -march=loongson3a |
| 31 | # can't easily be used safely within the kbuild framework. |
| 32 | # |
| 33 | ifeq ($(call cc-ifversion, -ge, 0409, y), y) |
| Huacai Chen | 820880c | 2016-03-17 20:41:06 +0800 | [diff] [blame] | 34 | ifeq ($(call ld-ifversion, -ge, 225000000, y), y) |
| Huacai Chen | 5188129 | 2016-01-21 21:09:48 +0800 | [diff] [blame] | 35 | cflags-$(CONFIG_CPU_LOONGSON3) += \ |
| 36 | $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) |
| 37 | else |
| 38 | cflags-$(CONFIG_CPU_LOONGSON3) += \ |
| 39 | $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) |
| 40 | endif |
| 41 | else |
| 42 | cflags-$(CONFIG_CPU_LOONGSON3) += \ |
| 43 | $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) |
| 44 | endif |
| 45 | |
| Paul Burton | 83c3684 | 2019-10-10 18:54:03 +0000 | [diff] [blame^] | 46 | # Some -march= flags enable MMI instructions, and GCC complains about that |
| 47 | # support being enabled alongside -msoft-float. Thus explicitly disable MMI. |
| 48 | cflags-y += $(call cc-option,-mno-loongson-mmi) |
| 49 | |
| Wu Zhangjin | 28c945c | 2010-06-01 18:29:04 +0800 | [diff] [blame] | 50 | # |
| 51 | # Loongson Machines' Support |
| 52 | # |
| 53 | |
| Huacai Chen | 30ad29b | 2015-04-21 10:00:35 +0800 | [diff] [blame] | 54 | platform-$(CONFIG_MACH_LOONGSON64) += loongson64/ |
| 55 | cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely |
| Wu Zhangjin | 28c945c | 2010-06-01 18:29:04 +0800 | [diff] [blame] | 56 | load-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000 |
| 57 | load-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000 |
| Huacai Chen | 5a21e0b | 2014-06-26 11:41:32 +0800 | [diff] [blame] | 58 | load-$(CONFIG_LOONGSON_MACH3X) += 0xffffffff80200000 |