Function report |
Source Code:arch\x86\kernel\fpu\init.c |
Create Date:2022-07-28 07:49:01 |
| Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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| Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:Initialize the registers found in all CPUs, CR0 and CR4:
Proto:static void fpu__init_cpu_generic(void)
Type:void
Parameter:Nothing
| 20 | cr4_mask = 0 |
| 22 | If boot_cpu_has(FXSAVE/FXRSTOR, CR4.OSFXSR ) Then cr4_mask |= X86_CR4_OSFXSR |
| 24 | If boot_cpu_has("sse" ) Then cr4_mask |= X86_CR4_OSXMMEXCPT |
| 26 | If cr4_mask Then Set in this cpu's CR4. |
| 30 | cr0 &= ~(X86_CR0_TS | X86_CR0_EM) |
| 31 | If Not boot_cpu_has(Onboard FPU ) Then cr0 |= X86_CR0_EM |
| 41 | asm volatile |
| Name | Describe |
|---|---|
| fpu__init_cpu | Enable all supported FPU features. Called when a CPU is brought online: |
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|---|---|
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