From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Date: Mon, 25 Jun 2012 09:10:26 -0600 Subject: [U-Boot] [PATCH] arm: bugfix: Move vector table before jumping relocated code In-Reply-To: <4FE85C59.1010400@kmckk.co.jp> References: <4FE85C59.1010400@kmckk.co.jp> Message-ID: <4FE87F62.6060200@wwwdotorg.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 06/25/2012 06:40 AM, Tetsuyuki Kobayashi wrote: > Interrupts and exceptions doesn't work in relocated code. > It badly use IRQ_STACK_START_IN in rom area as interrupt stack. > It is because the vecotr table is not moved to ram area. > This patch moves vector table before jumping relocated code. > > Signed-off-by: Tetsuyuki Kobayashi CC'ing in some Tegra people. Tetsuyuki, you probably want to CC some OMAP people too. > --- > arch/arm/cpu/armv7/start.S | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S > index 52f7f6e..5098f7b 100644 > --- a/arch/arm/cpu/armv7/start.S > +++ b/arch/arm/cpu/armv7/start.S > @@ -277,6 +277,18 @@ jump_2_ram: > mcr p15, 0, r0, c7, c10, 4 @ DSB > mcr p15, 0, r0, c7, c5, 4 @ ISB > #endif > +/* > + * Move vector table > + */ > +#if !defined(CONFIG_TEGRA2) > +#if !(defined(CONFIG_OMAP44XX) && defined(CONFIG_SPL_BUILD)) > + /* Set vector address in CP15 VBAR register */ > + ldr r0, =_start > + add r0, r0, r9 > + mcr p15, 0, r0, c12, c0, 0 @Set VBAR > +#endif > +#endif /* !Tegra2 */ > + > ldr r0, _board_init_r_ofs > adr r1, _start > add lr, r0, r1