From owner-dev-commits-src-all@freebsd.org Thu Feb 11 15:06:18 2021 Return-Path: Delivered-To: dev-commits-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 8A73652ADB0; Thu, 11 Feb 2021 15:06:18 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Dc0MG3Z1Bz3sbg; Thu, 11 Feb 2021 15:06:18 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 6D594130C3; Thu, 11 Feb 2021 15:06:18 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 11BF6IMW083891; Thu, 11 Feb 2021 15:06:18 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 11BF6IZq083890; Thu, 11 Feb 2021 15:06:18 GMT (envelope-from git) Date: Thu, 11 Feb 2021 15:06:18 GMT Message-Id: <202102111506.11BF6IZq083890@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Michal Meloun Subject: git: 214ef320018d - stable/13 - arm64: Initialize VFP control register. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: mmel X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 214ef320018db339d52e6ec9a02bf2a5691b6575 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Feb 2021 15:06:18 -0000 The branch stable/13 has been updated by mmel: URL: https://cgit.FreeBSD.org/src/commit/?id=214ef320018db339d52e6ec9a02bf2a5691b6575 commit 214ef320018db339d52e6ec9a02bf2a5691b6575 Author: Michal Meloun AuthorDate: 2021-01-23 20:19:07 +0000 Commit: Michal Meloun CommitDate: 2021-02-11 15:05:58 +0000 arm64: Initialize VFP control register. The RW fields in this register reset to architecturally unknown values, so initialize these to the proper rounding and denormal mode. MFC after: 1 week (cherry picked from commit 65618fdda0f272a823e6701966421bdca0efa301) --- sys/arm64/arm64/vfp.c | 4 ++++ sys/arm64/arm64/vm_machdep.c | 3 +++ sys/arm64/include/md_var.h | 2 ++ sys/arm64/include/vfp.h | 23 +++++++++++++++++++++++ 4 files changed, 32 insertions(+) diff --git a/sys/arm64/arm64/vfp.c b/sys/arm64/arm64/vfp.c index 51fba7a8a300..62244ddc80e8 100644 --- a/sys/arm64/arm64/vfp.c +++ b/sys/arm64/arm64/vfp.c @@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$"); #include #include +#include #include #include @@ -238,6 +239,9 @@ vfp_init(void) /* Disable to be enabled when it's used */ vfp_disable(); + + if (PCPU_GET(cpuid) == 0) + thread0.td_pcb->pcb_fpusaved->vfp_fpcr = initial_fpcr; } SYSINIT(vfp, SI_SUB_CPU, SI_ORDER_ANY, vfp_init, NULL); diff --git a/sys/arm64/arm64/vm_machdep.c b/sys/arm64/arm64/vm_machdep.c index 90d628a7d6ee..9e9b588c7db1 100644 --- a/sys/arm64/arm64/vm_machdep.c +++ b/sys/arm64/arm64/vm_machdep.c @@ -55,6 +55,8 @@ __FBSDID("$FreeBSD$"); #include #endif +uint32_t initial_fpcr = VFPCR_DN | VFPCR_FZ; + #include /* @@ -106,6 +108,7 @@ cpu_fork(struct thread *td1, struct proc *p2, struct thread *td2, int flags) td2->td_pcb->pcb_sp = (uintptr_t)td2->td_frame; td2->td_pcb->pcb_fpusaved = &td2->td_pcb->pcb_fpustate; td2->td_pcb->pcb_vfpcpu = UINT_MAX; + td2->td_pcb->pcb_fpusaved->vfp_fpcr = initial_fpcr; /* Setup to release spin count in fork_exit(). */ td2->td_md.md_spinlock_count = 1; diff --git a/sys/arm64/include/md_var.h b/sys/arm64/include/md_var.h index 0132ab0dd8fd..73cf642148b5 100644 --- a/sys/arm64/include/md_var.h +++ b/sys/arm64/include/md_var.h @@ -54,4 +54,6 @@ void generic_bs_poke_2(void) __asm(__STRING(generic_bs_poke_2)); void generic_bs_poke_4(void) __asm(__STRING(generic_bs_poke_4)); void generic_bs_poke_8(void) __asm(__STRING(generic_bs_poke_8)); +extern uint32_t initial_fpcr; + #endif /* !_MACHINE_MD_VAR_H_ */ diff --git a/sys/arm64/include/vfp.h b/sys/arm64/include/vfp.h index b4b9bb524d30..b0ba01a2a319 100644 --- a/sys/arm64/include/vfp.h +++ b/sys/arm64/include/vfp.h @@ -32,6 +32,29 @@ #ifndef _MACHINE_VFP_H_ #define _MACHINE_VFP_H_ +/* VFPCR */ +#define VFPCR_AHP (0x04000000) /* alt. half-precision: */ +#define VFPCR_DN (0x02000000) /* default NaN enable */ +#define VFPCR_FZ (0x01000000) /* flush to zero enabled */ + +#define VFPCR_RMODE_OFF 22 /* rounding mode offset */ +#define VFPCR_RMODE_MASK (0x00c00000) /* rounding mode mask */ +#define VFPCR_RMODE_RN (0x00000000) /* round nearest */ +#define VFPCR_RMODE_RPI (0x00400000) /* round to plus infinity */ +#define VFPCR_RMODE_RNI (0x00800000) /* round to neg infinity */ +#define VFPCR_RMODE_RM (0x00c00000) /* round to zero */ + +#define VFPCR_STRIDE_OFF 20 /* vector stride -1 */ +#define VFPCR_STRIDE_MASK (0x00300000) +#define VFPCR_LEN_OFF 16 /* vector length -1 */ +#define VFPCR_LEN_MASK (0x00070000) +#define VFPCR_IDE (0x00008000) /* input subnormal exc enable */ +#define VFPCR_IXE (0x00001000) /* inexact exception enable */ +#define VFPCR_UFE (0x00000800) /* underflow exception enable */ +#define VFPCR_OFE (0x00000400) /* overflow exception enable */ +#define VFPCR_DZE (0x00000200) /* div by zero exception en */ +#define VFPCR_IOE (0x00000100) /* invalid op exec enable */ + #ifndef LOCORE struct vfpstate { __uint128_t vfp_regs[32];