From patchwork Tue Nov 3 15:48:40 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Francois Retief X-Patchwork-Id: 539509 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 4444C1413DF for ; Wed, 4 Nov 2015 02:54:48 +1100 (AEDT) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id AF4C84BABF; Tue, 3 Nov 2015 16:54:07 +0100 (CET) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id clteZtG0ZezI; Tue, 3 Nov 2015 16:54:07 +0100 (CET) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 083794BAFE; Tue, 3 Nov 2015 16:53:49 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id DB5424BAA8 for ; Tue, 3 Nov 2015 16:53:38 +0100 (CET) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id k28jkei8F4Nu for ; Tue, 3 Nov 2015 16:53:38 +0100 (CET) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from SPASTBMXS01.sunspace.co.za (unknown [196.44.39.35]) by theia.denx.de (Postfix) with ESMTPS id 17AF34BAA9 for ; Tue, 3 Nov 2015 16:53:33 +0100 (CET) Received: from SPASTBMXS01.sunspace.co.za (10.24.0.111) by SPASTBMXS01.sunspace.co.za (10.24.0.111) with Microsoft SMTP Server (TLS) id 15.0.847.32; Tue, 3 Nov 2015 17:53:25 +0200 Received: from serengeti.sunspace.co.za (10.24.5.54) by SPASTBMXS01.sunspace.co.za (10.24.0.111) with Microsoft SMTP Server id 15.0.847.32 via Frontend Transport; Tue, 3 Nov 2015 17:53:25 +0200 From: Francois Retief To: Date: Tue, 3 Nov 2015 17:48:40 +0200 Message-ID: <1446565726-10777-7-git-send-email-fgretief@spaceteq.co.za> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1446565726-10777-1-git-send-email-fgretief@spaceteq.co.za> References: <1446565726-10777-1-git-send-email-fgretief@spaceteq.co.za> MIME-Version: 1.0 Received-SPF: None (SPASTBMXS01.sunspace.co.za: fgretief@spaceteq.co.za does not designate permitted sender hosts) Cc: Tom Rini Subject: [U-Boot] [PATCH v1 06/12] sparc: Update startup code to take PIC mode into account X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.15 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" Signed-off-by: Francois Retief --- arch/sparc/cpu/leon2/start.S | 60 ++++++++++++++++++++++++++++++-------------- arch/sparc/cpu/leon3/start.S | 60 ++++++++++++++++++++++++++++++-------------- 2 files changed, 82 insertions(+), 38 deletions(-) -- 2.4.3 diff --git a/arch/sparc/cpu/leon2/start.S b/arch/sparc/cpu/leon2/start.S index e43097c..974de76 100644 --- a/arch/sparc/cpu/leon2/start.S +++ b/arch/sparc/cpu/leon2/start.S @@ -57,6 +57,27 @@ MINFRAME = (WINDOWSIZE + ARGPUSHSIZE + 4) #error Must define number of SPARC register windows, default is 8 #endif +/* Macros to load address into a register. Uses GOT table for PIC */ +#ifdef __PIC__ + +#define SPARC_PIC_THUNK_CALL(reg) \ + sethi %pc22(_GLOBAL_OFFSET_TABLE_-4), %##reg; \ + call __sparc_get_pc_thunk.reg; \ + add %##reg, %pc10(_GLOBAL_OFFSET_TABLE_+4), %##reg; + +#define SPARC_LOAD_ADDRESS(sym, got, reg) \ + sethi %gdop_hix22(sym), %##reg; \ + xor %##reg, %gdop_lox10(sym), %##reg; \ + ld [%##got + %##reg], %##reg, %gdop(sym); + +#else + +#define SPARC_PIC_THUNK_CALL(reg) +#define SPARC_LOAD_ADDRESS(sym, got, tmp) \ + set sym, %##reg; + +#endif + #define STACK_ALIGN 8 #define SA(X) (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1)) @@ -278,7 +299,7 @@ leon2_init_mctrl: srl %g2, 30, %g2 andcc %g2, 3, %g6 bne,a leon2_init_wim - mov %g0, %asr16 ! clear err_reg + mov %g0, %asr16 ! clear err_reg leon2_init_wim: set WIM_INIT, %g3 @@ -299,7 +320,7 @@ leon2_init_stackp: cpu_init_unreloc: call cpu_init_f - nop + nop /* un relocated start address of monitor */ #define TEXT_START _text @@ -307,9 +328,10 @@ cpu_init_unreloc: /* un relocated end address of monitor */ #define DATA_END __init_end + SPARC_PIC_THUNK_CALL(l7) reloc: - set TEXT_START,%g2 - set DATA_END,%g3 + SPARC_LOAD_ADDRESS(TEXT_START, l7, g2) + SPARC_LOAD_ADDRESS(DATA_END, l7, g3) set CONFIG_SYS_RELOC_MONITOR_BASE,%g4 reloc_loop: ldd [%g2],%l0 @@ -319,7 +341,7 @@ reloc_loop: inc 16,%g2 subcc %g3,%g2,%g0 bne reloc_loop - inc 16,%g4 + inc 16,%g4 clr %l0 clr %l1 @@ -336,8 +358,8 @@ reloc_loop: clr_bss: /* clear bss area (the relocated) */ - set __bss_start,%g2 - set __bss_end,%g3 + SPARC_LOAD_ADDRESS(__bss_start, l7, g2) + SPARC_LOAD_ADDRESS(__bss_end, l7, g3) sub %g3,%g2,%g3 add %g3,%g4,%g3 clr %g1 /* std %g0 uses g0 and g1 */ @@ -348,19 +370,19 @@ clr_bss_16: inc 16,%g4 cmp %g3,%g4 bne clr_bss_16 - nop + nop /* add offsets to GOT table */ fixup_got: - set __got_start,%g4 - set __got_end,%g3 + SPARC_LOAD_ADDRESS(__got_start, l7, g4) + SPARC_LOAD_ADDRESS(__got_end, l7, g3) /* * new got offset = (old GOT-PTR (read with ld) - * CONFIG_SYS_RELOC_MONITOR_BASE(from define) ) + * Destination Address (from define) */ set CONFIG_SYS_RELOC_MONITOR_BASE,%g2 - set TEXT_START, %g1 + SPARC_LOAD_ADDRESS(TEXT_START, l7, g1) add %g4,%g2,%g4 sub %g4,%g1,%g4 add %g3,%g2,%g3 @@ -375,11 +397,11 @@ got_loop: inc 4,%g4 cmp %g3,%g4 bne got_loop - nop + nop prom_relocate: - set __prom_start, %g2 - set __prom_end, %g3 + SPARC_LOAD_ADDRESS(__prom_start, l7, g2) + SPARC_LOAD_ADDRESS(__prom_end, l7, g3) set CONFIG_SYS_PROM_OFFSET, %g4 prom_relocate_loop: @@ -390,7 +412,7 @@ prom_relocate_loop: inc 16,%g2 subcc %g3,%g2,%g0 bne prom_relocate_loop - inc 16,%g4 + inc 16,%g4 /* Trap table has been moved, lets tell CPU about * the new trap table address @@ -403,19 +425,19 @@ prom_relocate_loop: nop /* Call relocated init functions */ jump: - set cpu_init_f2,%o1 + SPARC_LOAD_ADDRESS(cpu_init_f2, l7, o1) set CONFIG_SYS_RELOC_MONITOR_BASE,%o2 add %o1,%o2,%o1 sub %o1,%g1,%o1 call %o1 - clr %o0 + clr %o0 - set board_init_f,%o1 + SPARC_LOAD_ADDRESS(board_init_f, l7, o1) set CONFIG_SYS_RELOC_MONITOR_BASE,%o2 add %o1,%o2,%o1 sub %o1,%g1,%o1 call %o1 - clr %o0 + clr %o0 dead: ta 0 ! if call returns... nop diff --git a/arch/sparc/cpu/leon3/start.S b/arch/sparc/cpu/leon3/start.S index 5f904fa..be9b3fb 100644 --- a/arch/sparc/cpu/leon3/start.S +++ b/arch/sparc/cpu/leon3/start.S @@ -57,6 +57,27 @@ MINFRAME = (WINDOWSIZE + ARGPUSHSIZE + 4) #error Must define number of SPARC register windows, default is 8 #endif +/* Macros to load address into a register. Uses GOT table for PIC */ +#ifdef __PIC__ + +#define SPARC_PIC_THUNK_CALL(reg) \ + sethi %pc22(_GLOBAL_OFFSET_TABLE_-4), %##reg; \ + call __sparc_get_pc_thunk.reg; \ + add %##reg, %pc10(_GLOBAL_OFFSET_TABLE_+4), %##reg; + +#define SPARC_LOAD_ADDRESS(sym, got, reg) \ + sethi %gdop_hix22(sym), %##reg; \ + xor %##reg, %gdop_lox10(sym), %##reg; \ + ld [%##got + %##reg], %##reg, %gdop(sym); + +#else + +#define SPARC_PIC_THUNK_CALL(reg) +#define SPARC_LOAD_ADDRESS(sym, got, tmp) \ + set sym, %##reg; + +#endif + #define STACK_ALIGN 8 #define SA(X) (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1)) @@ -229,7 +250,7 @@ clear_window: bge clear_window save -wininit: +wiminit: set WIM_INIT, %g3 mov %g3, %wim @@ -240,7 +261,7 @@ stackp: cpu_init_unreloc: call cpu_init_f - nop + nop /* un relocated start address of monitor */ #define TEXT_START _text @@ -248,9 +269,10 @@ cpu_init_unreloc: /* un relocated end address of monitor */ #define DATA_END __init_end + SPARC_PIC_THUNK_CALL(l7) reloc: - set TEXT_START,%g2 - set DATA_END,%g3 + SPARC_LOAD_ADDRESS(TEXT_START, l7, g2) + SPARC_LOAD_ADDRESS(DATA_END, l7, g3) set CONFIG_SYS_RELOC_MONITOR_BASE,%g4 reloc_loop: ldd [%g2],%l0 @@ -260,7 +282,7 @@ reloc_loop: inc 16,%g2 subcc %g3,%g2,%g0 bne reloc_loop - inc 16,%g4 + inc 16,%g4 clr %l0 clr %l1 @@ -277,8 +299,8 @@ reloc_loop: clr_bss: /* clear bss area (the relocated) */ - set __bss_start,%g2 - set __bss_end,%g3 + SPARC_LOAD_ADDRESS(__bss_start, l7, g2) + SPARC_LOAD_ADDRESS(__bss_end, l7, g3) sub %g3,%g2,%g3 add %g3,%g4,%g3 clr %g1 /* std %g0 uses g0 and g1 */ @@ -289,19 +311,19 @@ clr_bss_16: inc 16,%g4 cmp %g3,%g4 bne clr_bss_16 - nop + nop /* add offsets to GOT table */ fixup_got: - set __got_start,%g4 - set __got_end,%g3 + SPARC_LOAD_ADDRESS(__got_start, l7, g4) + SPARC_LOAD_ADDRESS(__got_end, l7, g3) /* * new got offset = (old GOT-PTR (read with ld) - * CONFIG_SYS_RELOC_MONITOR_BASE(from define) ) + * Destination Address (from define) */ set CONFIG_SYS_RELOC_MONITOR_BASE,%g2 - set TEXT_START, %g1 + SPARC_LOAD_ADDRESS(TEXT_START, l7, g1) add %g4,%g2,%g4 sub %g4,%g1,%g4 add %g3,%g2,%g3 @@ -316,11 +338,11 @@ got_loop: inc 4,%g4 cmp %g3,%g4 bne got_loop - nop + nop prom_relocate: - set __prom_start, %g2 - set __prom_end, %g3 + SPARC_LOAD_ADDRESS(__prom_start, l7, g2) + SPARC_LOAD_ADDRESS(__prom_end, l7, g3) set CONFIG_SYS_PROM_OFFSET, %g4 prom_relocate_loop: @@ -331,7 +353,7 @@ prom_relocate_loop: inc 16,%g2 subcc %g3,%g2,%g0 bne prom_relocate_loop - inc 16,%g4 + inc 16,%g4 /* Trap table has been moved, lets tell CPU about * the new trap table address @@ -358,19 +380,19 @@ snoop_detect: nop /* Call relocated init functions */ jump: - set cpu_init_f2,%o1 + SPARC_LOAD_ADDRESS(cpu_init_f2, l7, o1) set CONFIG_SYS_RELOC_MONITOR_BASE,%o2 add %o1,%o2,%o1 sub %o1,%g1,%o1 call %o1 - clr %o0 + clr %o0 - set board_init_f,%o1 + SPARC_LOAD_ADDRESS(board_init_f, l7, o1) set CONFIG_SYS_RELOC_MONITOR_BASE,%o2 add %o1,%o2,%o1 sub %o1,%g1,%o1 call %o1 - clr %o0 + clr %o0 dead: ta 0 ! if call returns... nop