Commit dcea564e authored by David Brown's avatar David Brown Committed by David Brown
Browse files

boot: Add capability for ram loading 



The MCUBOOT_RAM_LOAD feature supports configurations where code is
loaded from flash into RAM before execution.  As such, it is not
necessary for upgrades to move data around in flash.

Signed-off-by: default avatarDavid Brown <david.brown@linaro.org>
parent 122f9e70

boot/bootutil/include/bootutil/caps.h

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ uint32_t bootutil_get_caps(void); 
#define BOOTUTIL_CAP_ENC_X25519             (1<<13)

#define BOOTUTIL_CAP_BOOTSTRAP              (1<<14)

#define BOOTUTIL_CAP_AES256                 (1<<15)

#define BOOTUTIL_CAP_RAM_LOAD               (1<<16)



/*

 * Query the number of images this bootloader is configured for.  This

boot/bootutil/src/caps.c

+3 −0
Original line number Diff line number Diff line
@@ -72,6 +72,9 @@ uint32_t bootutil_get_caps(void) 
#if defined(MCUBOOT_AES_256)

    res |= BOOTUTIL_CAP_AES256;

#endif

#if defined(MCUBOOT_RAM_LOAD)

    res |= BOOTUTIL_CAP_RAM_LOAD;

#endif



    return res;

}

sim/src/caps.rs

+7 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ pub enum Caps { 
    EncX25519            = (1 << 13),

    Bootstrap            = (1 << 14),

    Aes256               = (1 << 15),

    RamLoad              = (1 << 16),

}



impl Caps {
@@ -39,6 +40,12 @@ impl Caps { 
    pub fn get_num_images() -> usize {

        (unsafe { bootutil_get_num_images() }) as usize

    }



    /// Query if this configuration performs some kind of upgrade by writing to flash.

    pub fn modifies_flash() -> bool {

        // All other configurations perform upgrades by writing to flash.

        !Self::RamLoad.present()

    }

}



extern "C" {

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